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Murthy SI. Commentary: Pupil expansion devices: A boon for safe cataract surgery in small pupils. Indian J Ophthalmol 2021; 69:2694. [PMID: 34571617 PMCID: PMC8597467 DOI: 10.4103/ijo.ijo_2248_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- Somasheila I Murthy
- Cornea Service, The Cornea Institute, Consultant, Uvea Service, L V Prasad Eye Institute, Hyderabad, Telangana, India
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Kaur M, Bhai N, Titiyal JS. Risk factors for complications during phacoemulsification cataract surgery. EXPERT REVIEW OF OPHTHALMOLOGY 2020. [DOI: 10.1080/17469899.2020.1806715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Manpreet Kaur
- Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India
| | - Nithya Bhai
- Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India
| | - Jeewan S. Titiyal
- Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India
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Lu K, Garcia M, Tian J, Karanjia R. Series of cataract surgeries with I-ring pupil expansion ring. World J Ophthalmol 2019; 8:1-6. [DOI: 10.5318/wjo.v8.i1.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 08/28/2019] [Accepted: 10/04/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The retrospective review of I-ring pupil expansion ring use is designed to examine the patient characteristics and associated surgical challenges in a clinical practice. The hypothesis is that I-ring provides a necessary additive tool in dealing with challenging cataract surgeries with small pupils.
AIM To document the safety profile and use of I-ring pupil expansion ring in a clinical practice.
METHODS A retrospective chart review of 12 consecutive cases within the same year (2016) of cataract surgeries employing I-ring pupil expansion ring (Beaver-Visitec, International) by a single surgeon at the same ambulatory surgical center was conducted. Demographic, pre-op, intra-op, and post-op data were recorded. Total number of cataract cases performed was also recorded.
RESULTS 8 of 12 cases were planned I-ring cases. 1 case was decided intraoperatively when femtosecond laser caused the pupil to shrink. The other 3 cases were also decided upon intraoperatively when pupil was deemed to be small. 7 patients had IFIS from Flomax use. 2 patients had pseudoexfoliation syndrome as the cause of small pupil. 2 patients had narrow angles with brunescent cataracts. 2 patients had pre-op partial zonular dehiscence. 1 patient had 360o of posterior synechiae. 2 cases had ruptured posterior capsule that required anterior vitrectomy. No complications were attributed to the pupil expansion ring. A total of 296 cataract surgeries were performed that year by the surgeon, making the rate of pupil ring use 4.1%.
CONCLUSION Small pupil requiring pupil expansion ring during cataract surgery is often associated with other challenges, such as brunescent cataract, zonular weakness, and posterior synechiae in this series. I-ring helped to reduce at least one challenge in these difficult cases.
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Affiliation(s)
- Kenneth Lu
- Doheny Eye Institute, University of California, Los Angeles, CA 91007, United States
| | - Martin Garcia
- Doheny Eye Institute, University of California, Los Angeles, CA 91007, United States
| | - Jack Tian
- Doheny Eye Institute, University of California, Los Angeles, CA 91007, United States
| | - Rustum Karanjia
- Doheny Eye Institute, University of California, Los Angeles, CA 91007, United States
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Malyugin BE, Anisimova NS. [Mechanical dilation of the pupil and its possible applications in femtosecond laser-assisted cataract surgery]. Vestn Oftalmol 2018. [PMID: 29543206 DOI: 10.17116/oftalma2018134197-103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In certain cases intraoperative pupil dilation during cataract surgery may be necessary to improve the visualization of intraocular structures and assure the atraumatic nature of surgical manipulations. The article reviews a wide range of pupil expanders, their historical aspects and possibilities of their application in modern cataract surgery.
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Affiliation(s)
- B E Malyugin
- S. Fyodorov Eye Microsurgery Federal State Institution, Beskudnikovsky Blvd., 59А, Moscow, Russian Federation, 127486
| | - N S Anisimova
- S. Fyodorov Eye Microsurgery Federal State Institution, Beskudnikovsky Blvd., 59А, Moscow, Russian Federation, 127486
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Abstract
Purpose To assess the efficiency of pupillary stretching with iris hooks in poorly dilatable pupils during phacoemulsification. Methods Forty eyes with maximal preoperative mydriasis less than 4.5 mm (mean 3.9 mm S.D. 1.0) received bimanual pupillary stretching according to the technique of Miller and Keener (1994). Results Small pupils were mainly caused by long-term pilocarpine therapy (n=21), posterior synechia (n=11) or diabetic iridopathy (n=7). With multidirectional stretching, the pupil could be enlarged to mean 6.6 mm (S.D. 0.66), lasting throughout phacoemulsification. The effect of stretching was significantly greater in eyes with synechias, but no significant differences in post-operative pupil motility was observed between the three subgroups. Six eyes with pronounced postoperative inflammation responded well to antiinflammatory treatment. Conclusions Done with routine surgical instruments, bimanual pupillary stretching seems to be an easy, safe and effective procedure for enlarging small pupils by an average of 2.7 mm during phacoemulsification, especially in eyes with posterior synechias.
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Affiliation(s)
- A Bacskulin
- Department of Ophthalmology, University of Rostock, Germany
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Abstract
This paper presents the review of historical aspects and the current state-of-the-art in various pupil dilatation methods to be used in cataract surgery. The surgical algorithm in managing small pupil cases should include topical and intraocular mydriatics, appropriately selected viscosurgical device and mechanical dilatation with instruments, iris hooks, and/or pupil expanders.
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Affiliation(s)
- Boris Malyugin
- S. Fyodorov Eye Microsurgery State Institution, Moscow, Russia
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Effect of intracameral injection of bisulfite-containing phenylephrine on rabbit corneal endothelium. Cornea 2014; 34:460-3. [PMID: 25474237 DOI: 10.1097/ico.0000000000000312] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
PURPOSE The aim of this study was to investigate the effect of intracameral injection of bisulfite-containing phenylephrine on rabbit corneal endothelium cells in rabbits. METHODS Fifteen eyes of 15 New Zealand white rabbits were divided into 3 groups. Five eyes from each group were injected with 0.5% (0.5 mL, 0.05% bisulfite, group 1), 1.0% bisulfite-containing phenylephrine (0.5 mL, 0.1% bisulfite, group 2), or an equal volume of balanced salt solution as a control (group 3). Specular microscopy, corneal pachymetry, and a slit-lamp examination were used to evaluate corneal endothelial cell loss and other complications before injection, and at 1 hour and 1 week after injection. For morphological studies, corneal buttons were excised at 1 week and stained with alizarin red and trypan blue. Optical microscopy was used to examine 1 cornea from each of the 3 groups. RESULTS Within each group, there were no changes in specular microscopy and corneal pachymetry findings over the 1-week duration of the study. Although all groups showed the presence of several giant cells in the endothelium, the hexagonal shape of the corneal endothelium was morphologically preserved, and no abnormal endothelial cells were observed. CONCLUSIONS Intracameral injection of bisulfite-containing phenylephrine (up to 1.0%) does not affect endothelial cell viability or morphology of the rabbit cornea.
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Small Pupil Phaco Surgery: A New Technique. ACTA ACUST UNITED AC 2007; 39:185-93. [DOI: 10.1007/s12009-007-0023-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2007] [Revised: 11/30/1999] [Accepted: 03/27/2007] [Indexed: 10/22/2022]
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Chalam KV, Gupta SK, Agarwal S, Shah VA. Sutureless Limited Vitrectomy for Positive Vitreous Pressure in Cataract Surgery. Ophthalmic Surg Lasers Imaging Retina 2005. [DOI: 10.3928/1542-8877-20051101-16] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Chang DF, Campbell JR. Intraoperative floppy iris syndrome associated with tamsulosin. J Cataract Refract Surg 2005; 31:664-73. [PMID: 15899440 DOI: 10.1016/j.jcrs.2005.02.027] [Citation(s) in RCA: 345] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/16/2005] [Indexed: 01/25/2023]
Abstract
PURPOSE To assess the incidence and possible causative factors of a newly recognized syndrome, the intraoperative floppy iris (IFIS). SETTING Clinical practices in Los Altos and San Rafael, California, USA. METHODS A retrospective chart review of consecutive cataract surgeries performed in a 2-surgeon practice over a 12-month period (706 eyes; 511 patients) was used to assess the percentage of cataract patients on systemic sympathetic alpha-1 antagonist medications as well as the percentage of patients who manifested the IFIS. A separate prospective study of 900 consecutive cases (741 patients) performed by another surgeon was used to determine the incidence of IFIS and the percentage of these patients who were taking alpha-1 antagonist medications. RESULTS Three percent (16/511) of the patients in the retrospective study, representing 3.0% (25/706) of the total eyes, were taking tamsulosin (Flomax) for benign prostatic hypertrophy. The overall prevalence of IFIS was 2.0% (10/511 patients). The syndrome was noted intraoperatively in 63.0% (10/16) of the tamsulosin patients but in none of the 11 patients on other systemic alpha-1 blockers. In the prospective study of 900 consecutive cataract surgeries, the prevalence of IFIS was 2.2% (16/741 patients). Ninety-four percent (15/16) of the IFIS patients were taking or had taken systemic tamsulosin. Twenty-six patients (36 eyes) in the 2 studies had IFIS associated with systemic tamsulosin. Sphincterotomies and mechanical pupil stretching were ineffective in maintaining adequate pupil dilation in this surgical population. CONCLUSION Intraoperative floppy iris syndrome occurred in approximately 2% of a cataract surgery population and appeared to be caused by tamsulosin, a systemic sympathetic alpha-1A antagonist medication that is the most frequently prescribed medication for benign prostatic hypertrophy.
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Akman A, Yilmaz G, Oto S, Akova YA. Comparison of various pupil dilatation methods for phacoemulsification in eyes with a small pupil secondary to pseudoexfoliation. Ophthalmology 2004; 111:1693-8. [PMID: 15350324 DOI: 10.1016/j.ophtha.2004.02.008] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2002] [Accepted: 02/10/2004] [Indexed: 12/24/2022] Open
Abstract
PURPOSE To compare 4 methods for intraoperative pupil dilatation in eyes with pseudoexfoliation syndrome and insufficient pupil size during phacoemulsification. DESIGN Prospective, randomized, comparative, interventional case series. PARTICIPANTS Forty eyes of 40 patients with pseudoexfoliation and maximally dilated pupil size smaller than 3.5 mm. INTERVENTION Mechanical pupil dilatation with iris-retractor hooks (group I), polymethyl methacrylate (PMMA) pupil dilator-ring (Morcher, Stuttgart, Germany) (group II), Beehler pupil dilator (group III), and bimanual stretching (group IV). MAIN OUTCOME MEASURES Performance (pupil size achieved), complications, and added surgical time. RESULTS The mean pupil sizes achieved with the PMMA pupil-dilator ring, Beehler pupil dilator, and bimanual stretching were 5.9+/-0.6 mm, 5.5+/-0.8 mm, and 4.9+/-0.7 mm, respectively. A square-shaped pupil was achieved with iris-retractor hooks, and the mean size of the largest circle that can fit in this square was 5.6+/-0.6 mm. There were no statistically significant differences in the postdilatation pupil sizes between the 4 study groups (P>0.05). Apart from self-limited intraoperative hemorrhage from pupil margin, iris sphincter rupture was the only observed complication related to mechanical pupil dilatation. This occurred in 4 eyes in groups I and III, 3 eyes in group IV, and 1 eye in group II (P>0.05). The mean added surgical time for placement of iris-retractor hooks and for implantation of a PMMA pupil-dilator ring was 297+/-51 and 176+/-54 seconds, respectively. The additional time required for pupil dilatation with the Beehler pupil dilator and bimanual stretching was 65+/-8 and 55+/-10 seconds, respectively. The time needed for pupil dilatation in groups I and II is significantly longer than that in groups III and IV (P<0.001). CONCLUSIONS All 4 methods used in this study were effective procedures for the mechanical dilatation of small pupils secondary to pseudoexfoliation syndrome. Iris-retractor hooks and the PMMA pupil-dilator ring are the most time-consuming techniques but have the advantage of a stable pupil size throughout the surgery. The PMMA pupil-dilator ring causes the least iris trauma. The Beehler pupil dilator and bimanual stretching technique were the least time-consuming methods for mechanical pupil dilatation.
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Affiliation(s)
- Ahmet Akman
- Department of Ophthalmology, Başkent University Faculty of Medicine, Ankara, Turkey.
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Trotter WL, Miller KM. Outcomes of cataract extraction in functionally monocular patients. Case-control study. J Cataract Refract Surg 2002; 28:1348-54. [PMID: 12160803 DOI: 10.1016/s0886-3350(01)01320-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
PURPOSE To compare the ocular comorbidities, visual outcomes, and surgical complications between a series of functionally monocular patients who had phacoemulsification and intraocular lens (IOL) implantation and a control group of age- and sex-matched binocular patients. SETTING Jules Stein Eye Institute and the Department of Ophthalmology, UCLA School of Medicine, Los Angeles, California, USA. METHODS The records of a consecutive series of 100 functionally monocular patients who had phacoemulsification and IOL implantation were reviewed. The records of a control group of binocularly sighted patients who were matched to the monocular patients by age, sex, and date of surgery were also reviewed. RESULTS Thirteen patients in the monocular group were monocular because of surgical complications. The remaining patients (87%) were monocular from medical conditions. Monocular patients had significantly more ocular comorbidity than binocular control patients (P <.0001). Age-related macular degeneration, diabetic retinopathy, and open-angle glaucoma were the most common reasons for monocular status and the most common ocular comorbidities in study eyes. The median preoperative best corrected visual acuity (BCVA) was 20/50 in the monocular group and 20/40 in the binocular group. The median postoperative BCVA was 20/25 and 20/20, respectively. A final BCVA of 20/40 or worse was the result of preexisting macular pathology or glaucoma in every instance. Surgical complications (P =.096) and the number of postoperative procedures (P =.724) were similar between the 2 groups. CONCLUSIONS Ocular comorbidity was significantly more prevalent in the eyes of monocular patients. Monocular and binocular patients experienced a 3-line improvement in BCVA after cataract surgery; however, the final median acuity was 20/25 in the monocular group and 20/20 in the binocular group. The 2 groups had a similar complication rate.
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Affiliation(s)
- William L Trotter
- Department of Ophthalmology, Jules Stein Eye Institute, UCLA School of Medicine, 100 Stein Plaza, Los Angeles, CA 90095-7002, USA
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Abstract
This technique facilitates phacoemulsification and foldable intraocular lens (IOL) implantation in eyes with extremely crowded anterior segments. An automated pars plana vitreous tap is used to expand the anterior segment when extremely shallow anterior chambers do not deepen sufficiently with viscoelastic injection alone. This technique permits successful completion of pupilloplasty, capsulorhexis, phacoemulsification, and foldable IOL implantation in these high-risk eyes.
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Tognetto D, Agolini G, Grandi G, Ravalico G. Iris alteration using mechanical iris retractors. J Cataract Refract Surg 2001; 27:1703-5. [PMID: 11687376 DOI: 10.1016/s0886-3350(01)00764-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
A 74-year-old woman had a 3-port pars plana vitrectomy for a dropped nucleus after complicated phacoemulsification. Flexible nylon iris retractors were positioned to dilate the small pupil. The patient died of a pulmonary embolus 1 day after surgery. The eyeball was removed at autopsy, and pathology of the iris was investigated. Localized damage to the iris where the retractor hooks were positioned was noted, but no other alterations to the iris were observed. These findings may explain the recovery of pupil function that is common after surgery with mechanical iris retractors.
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Affiliation(s)
- D Tognetto
- Eye Clinic, University of Trieste, Italy.
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Abstract
PURPOSE To determine the best corrected visual acuity (BCVA) outcomes and surgical complications in a consecutive series of functionally monocular patients who had phacoemulsification and intraocular lens (IOL) implantation. SETTING University-based referral practice, Los Angeles, California, USA. METHODS The medical records of 93 monocular patients who had phacoemulsification and IOL implantation between December 1991 and February 1999 were reviewed. Patients were considered to be monocular if Snellen BCVA in their fellow eye (the eye not having surgery) was worse than 20/200. Recorded were demographic information, anesthesia method, additional surgery, IOL model, preoperative and postoperative BCVA, reason for poor vision in the unoperated eye, co-morbidities in the operated eye, intraoperative and postoperative complications, length of follow-up, and postoperative procedures. RESULTS Mean patient age was 72 years and mean follow-up, 6 months. Thirteen patients (14%) were monocular from complications of surgery. Eighty patients (86%) were monocular because of medical eye conditions. Ocular co-morbidities were present in 75% of eyes having surgery. Preoperative median BCVA was 20/60. Median BCVA was 20/30 by the final scheduled follow-up examination and 20/25 by the final follow-up examination. Thirty-seven percent of eyes were correctable to 20/20 or better, and 67% were correctable to 20/40 or better. Two eyes lost BCVA by the final scheduled postoperative examination, and 3 eyes lost BCVA by the final follow-up examination. Final BCVA of worse than 20/40 was always related to preexisting macular or optic-nerve pathology. There were 16 intraoperative or early postoperative complications. The most common (3 eyes) was posterior capsule plaque that could not be removed by capsule polishing. Twenty eyes (22%) had subsequent surgical procedures, the most common being laser posterior capsulotomy. No patient who was monocular from surgical complications had similar problems with second-eye cataract surgery. CONCLUSIONS Best corrected visual acuity, the standard measure of efficacy in cataract surgery, improved a median of 3 to 4 Snellen lines. The safety of the procedure, as evidenced by the small number of patients who lost BCVA or experienced surgical complications, was satisfactory. Functionally monocular patients are likely to have ocular co-morbidities, some of which may limit the final visual outcome of surgery.
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Affiliation(s)
- K L Bergwerk
- Department of Ophthalmology, University of California, Los Angeles School of Medicine, California, USA
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Abstract
PURPOSE To evaluate the intraoperative difficulties and long-term outcome of phacoemulsification through a small pupil using minimal iris manipulation. SETTINGS Iladevi Cataract & IOL Research Centre, Ahmedabad, India. METHODS This prospective study included 30 consecutive eyes with a maximally dilated pupil size of 4.0 mm or smaller. Except synechiolysis and occasional pupil retraction with a chopper, no iris manipulation was performed. The phacoemulsification technique included creation of deep central space, use of a low aspiration flow rate with appropriate vacuum, and step-by-step chop in situ and lateral separation of the nucleus. Patients were examined 1 day, 1 week, 1 and 3 months, and 1 year postoperatively. Specular microscopy was performed at 1 month and 1 year. RESULTS Fourteen eyes had chronic iritis, 12 had glaucoma surgery, 2 had pseudoexfoliation, and 2 had a rigid pupil. Mean follow-up was 13.6 months. Eighteen eyes (60%) had hard cataract. Mean preoperative pupil size was 2.80 mm +/- 0.75 (SD). Mean pupil size before the capsulorhexis was initiated was 4.42 +/- 0.58 mm. The iris was bruised in 10 eyes during cortex removal. Trace amounts of cortex were left in 4 cases. Two eyes had increased intraocular pressure in the early postoperative period. Six patients had a minimal amount of retained viscoelastic material (pseudofibrin), and 2 patients developed a sterile hypopyon. Sixteen eyes had cell deposits on the IOL surface and 12 eyes, fine uveal pigments. In 2 eyes with previous glaucoma surgery and in all eyes with iritis except 2, posterior synechias reformed. CONCLUSIONS Successful phacoemulsification was done with minimal or no pupil-widening maneuvers, restoring the preoperative pupil configuration.
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Affiliation(s)
- A Vasavada
- Iladevi Cataract & IOL Research Centre, Raghudeep Eye Clinic, Ahmedabad, India
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Eshete A, Bergwerk KL, Masket S, Miller KM. Phacoemulsification and lens implantation after scleral buckling surgery. Am J Ophthalmol 2000; 129:286-90. [PMID: 10704541 DOI: 10.1016/s0002-9394(99)00352-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
PURPOSE To determine the intraoperative and postoperative complications and best-corrected visual acuity outcomes of eyes undergoing phacoemulsification and intraocular lens implantation after retinal detachment repair by the scleral buckling technique. METHODS The charts of all patients who underwent phacoemulsification and intraocular lens implantation between July 1991 and May 1998 in two surgical practices were reviewed to identify eyes with a history of retinal detachment repaired by the scleral buckling technique. Eyes with a history of pars plana vitrectomy were excluded. Demographic and surgical data, preoperative and postoperative best-corrected visual acuity, and intraoperative and postoperative complications were recorded. RESULTS We identified 34 eyes of 32 patients. The mean interval from retinal detachment repair to phacoemulsification was 12.4 years. The mean interval from phacoemulsification to final examination was 20 months. Risk factors for retinal detachment included isolated myopia (82%), myopia with lattice retinal degeneration (5.9%), and myopia with trauma (8.8%). One eye (2.9%) had no identifiable risk factors. Final best-corrected visual acuity of 20/40 or better was attained in 29 (85%) of 34 eyes and 20/20 or better in 18 (53%) of the eyes. Of the five eyes with the lowest best-corrected visual acuity, three had a macula-off retinal detachment; one had a posterior capsule opacity, epiretinal membrane, and corneal edema secondary to ocular ischemia; and one had advanced glaucoma. All five eyes still experienced an improvement in best-corrected visual acuity. With regard to complications, one eye had a posterior capsular tear with vitreous loss and another developed a postoperative retinal tear. Posterior capsule opacification requiring laser capsulotomy developed in 13 eyes (38%). No eye developed a retinal redetachment. CONCLUSION Phacoemulsification and intraocular lens implantation can be performed safely after scleral buckling surgery and excellent best-corrected visual acuity results can be attained in most eyes. No modification of surgical technique is necessary. No retinal redetachment occurred in this series.
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Affiliation(s)
- A Eshete
- Department of Ophthalmology, UCLA School of Medicine, Los Angeles, CA 90095-7002, USA
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Abstract
The techniques and results of cataract surgery have changed dramatically during the past three decades. In the USA, we have moved from intracapsular cataract extraction as the preferred technique to almost exclusively extracapsular techniques. Smaller incisions have become the standard, with phacoemulsification now being the method of choice for most surgeons. Along with these advances have come improved intraocular lens materials and designs, especially well suited for use with smaller incisions. Phacoemulsification as a method to remove the cataractous lens was first proposed more than 20 years ago. Advances in techniques and equipment have led to a dramatic increase in the popularity of phacoemulsification with increased safety and efficiency. Viscoelastic agents have been developed synchronously with modern phacoemulsification techniques, playing an integral role in the success of this new technology. Improved surgical techniques for removing the anterior lens capsule have decreased the incidence of both intraoperative and postoperative capsular complications. Nucleus removal, formerly performed primarily in the anterior chamber, is now performed in the posterior chamber, decreasing damage to the corneal endothelium. Improved wound construction allows many wounds to be left unsutured, and smaller wounds allow shorter recovery time and greater intraoperative control and safety. Intraocular lenses can have smaller optic sizes and still maintain accurate centration. Foldable intraocular lenses can take advantage of the smaller incision, even further shortening the time to visual recovery. Continual evolution of this technology promises to further improve patient outcomes after cataract surgery.
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Holland GN, Van Horn SD, Margolis TP. Cataract surgery with ciliary sulcus fixation of intraocular lenses in patients with uveitis. Am J Ophthalmol 1999; 128:21-30. [PMID: 10482090 DOI: 10.1016/s0002-9394(99)00140-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
PURPOSE To describe intentional placement of intraocular lens haptics in the ciliary sulcus of patients with uveitis who are at high risk for postoperative posterior synechiae and lens dislocation. METHODS We reviewed our experience with 16 eyes of 12 patients with uveitis who underwent cataract surgery with ciliary sulcus fixation of intraocular lenses. Patients were followed for a median of 16.5 months (range, 9 to 44 months) after surgery. We evaluated eyes for surgical technique and the following preoperative and postoperative factors: best-corrected visual acuity, intraocular pressure, anterior chamber cells, and posterior synechiae. The following additional postoperative factors were sought: lens dislocation, lens edge capture, and evidence of pigment dispersion. RESULTS Posterior synechiae were present in 13 eyes before surgery; postoperative posterior synechiae developed in only three of these eyes. These adhesions resulted in lens edge capture in one eye and limited lens decentration in another. Scant pigment was present on the lens optic or in the anterior chamber, suggesting pigment dispersion, in four eyes. We found no evidence of consistently increased anterior segment inflammation or intraocular pressure after surgery when compared with preoperative levels for this group of patients. Postoperative posterior synechiae were seen more often in eyes that had can-opener anterior capsulotomy than in eyes that had continuous, curvilinear capsulorhexis (P = .036). CONCLUSIONS Ciliary sulcus fixation allows the intraocular lens to serve as a physical barrier between the iris and the lens capsule remnants. This technique may be useful for reducing the risk of postoperative posterior synechiae in patients with uveitis without increasing the risk of other postoperative problems.
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Affiliation(s)
- G N Holland
- University of California, Los Angeles, Ocular Inflammatory Disease Center, the Jules Stein Eye Institute, and the Department of Ophthalmology, UCLA School of Medicine, 90095-7003, USA
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23
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Abstract
Flexible iris hooks can be used to facilitate phacoemulsification in eyes with small pupils or damaged zonules. In addition to their conventional use as an iris retractor, the hooks can create a tenting effect that, when combined with pupil and continuous curvilinear capsulorhexis (CCC) enlargement, can prevent anterior capsule damage during phacoemulsification in eyes with small pupils. In addition, CCC enlargement stabilizes the lens in eyes with zonular damage.
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Affiliation(s)
- J Novák
- Department of Ophthalmology, Faculty of Medicine, Charles University Hospital, Hradec Králové, Czech Republic
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Lederer CM. Combined cataract extraction with intraocular lens implant and mitomycin-augmented trabeculectomy. Ophthalmology 1996; 103:1025-34. [PMID: 8684790 DOI: 10.1016/s0161-6420(96)30571-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
PURPOSE Cataract and glaucoma commonly coexist in elderly patients and present complex treatment options. This study investigates the results of simultaneous treatment of both conditions using phacoemulsification with posterior chamber lens implant and mitomycin-augmented trabeculectomy (combined surgery). METHODS A retrospective analysis was performed of 56 consecutive patients who had undergone combined surgery. Fifty-one (91%) of 56 patients had fornix-based conjunctival flaps resutured at the limbus. A variety of postoperative interventional techniques (mechanical and pharmacologic) were used to encourage the achievement of successful filtering blebs. RESULTS All patients had follow-up of at least 12 months. The mean preoperative intraocular pressure (IOP) was 20.2 mmHg (range, 14-43 mmHg) and the mean postoperative IOP was 10.7 mmHg (range, 4-17 mmHg). Fifty-three (95%) of 56 patients had IOPs of 15 mmHg or less at the completion of follow-up. All except two patients (96%) were able to discontinue all glaucoma medications. The filtering blebs that resulted from the fornix-based conjunctival flap procedures were predominantly large, diffuse, and noncystic. Best-corrected visual acuity was 20/40 or better in 47 (84%) of 56 of patients. CONCLUSION Control of IOP and improvement of visual acuity can be achieved in a high percentage of patients with coexisting cataract and glaucoma by performing combined surgery using intraoperative mitomycin and fornix-based conjunctival flaps resutured to the limbus. The filtering blebs illustrated a distinctive morphology compared with blebs resulting from limbus-based conjunctival flap procedures.
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Affiliation(s)
- C M Lederer
- Department of Ophthalmology Eye Foundation, University of Missouri-Kansas City School of Medicine, USA
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Masket S. Avoiding complications associated with iris retractor use in small pupil cataract extraction. J Cataract Refract Surg 1996; 22:168-71. [PMID: 8656379 DOI: 10.1016/s0886-3350(96)80213-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
While there are several options for managing the small pupil during cataract surgery, adjustable iris retractors are beneficial when there is a risk of cutting or tearing the iris, such as with rubeosis. Appropriate use of this new surgical tool includes proper placement of the parcenteses and a gradual and limited enlargement of the pupil, perhaps to no more than 5.0 mm.
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Affiliation(s)
- S Masket
- Jules Stein Eye Institute, University of California Center for Health Sciences, Los Angeles, USA
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Dinsmore SC. Modified stretch technique for small pupil phacoemulsification with topical anesthesia. J Cataract Refract Surg 1996; 22:27-30. [PMID: 8656356 DOI: 10.1016/s0886-3350(96)80267-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
I present an atraumatic technique for small pupil phacoemulsification using topical anesthesia. Fifty consecutive small pupil phacoemulsification cases were performed with topical anesthesia and mild intravenous sedation. Viscoelastic combined with a modified two instrument stretch was used for pupillary enlargement adequate for phacoemulsification. After preoperative cycloplegia, two or more multidirectional stretches were used for 3.0 to 5.0 mm pupils; three or more multidirectional stretches were used for pupils less than 3.0 mm. Pain and proprioceptive responses were avoided by reducing the stretch length, leaving the angle structures and ciliary body untouched. Sodium hyaluronate (Healon GV) created additional expansive power. Of 50 successfully implanted cases, 45 (90%) had acceptable pupillary form and function postoperatively. The 5 (10%) with enlarged, atonic pupils had past injury or inflammatory disease. This technique minimizes anterior segment trauma, instrumentation, and operating time.
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