Primary anterior chamber intraocular lens for the treatment of severe crystalline lens subluxation

2009 ◽  
Vol 35 (10) ◽  
pp. 1821-1825 ◽  
Author(s):  
Richard S. Hoffman ◽  
Howard I. Fine ◽  
Mark Packer
Keyword(s):  
Anterior Chamber ◽  
Intraocular Lens ◽  
Crystalline Lens ◽  
Lens Subluxation

scholarly journals Anterior Chamber Iris Claw Lens for the Treatment of Aphakia in a Patient with Megalocornea

2015 ◽  
Vol 6 (2) ◽  
pp. 164-169 ◽  
Author(s):  
Norman Saffra ◽  
Aleksandr Rakhamimov ◽  
Robert Masini ◽  
Kenneth J. Rosenthal
Keyword(s):  
Anterior Chamber ◽  
Intraocular Lens ◽  
Crystalline Lens ◽  
Posterior Chamber ◽  
Cataract Formation ◽  
Posterior Chamber Intraocular Lens ◽  
Effective Option ◽  
Iris Claw Lens ◽  
Capsular Bag ◽  
Iris Claw

Megalocornea in isolation is a rare congenital enlargement of the cornea greater than 13 mm in diameter. Patients with megalocornea are prone to cataract formation, crystalline lens subluxation, zonular deficiencies and dislocation of the posterior chamber intraocular lens (PCIOL) within the capsular bag. A 55-year-old male with megalocornea in isolation developed subluxation of the capsular bag and PCIOL. The PCIOL and capsular bag were explanted, and the patient was subsequently implanted with an anterior chamber iris claw lens. An anterior chamber iris claw lens is an effective option for the correction of aphakia in patients with megalocornea.

scholarly journals Stability of Cachet Phakic Intraocular Lens Position During 6-Months Follow-Up

2013 ◽  
Vol 7 (1) ◽  
pp. 20-23 ◽  
Author(s):  
D Schiano Lomoriello ◽  
M Lombardo ◽  
L Gualdi ◽  
L Iacobelli ◽  
L Tranchina ◽  
...  
Keyword(s):  
Anterior Chamber ◽  
Intraocular Lens ◽  
Minimum Distance ◽  
Anterior Segment ◽  
Crystalline Lens ◽  
Optic Disk ◽  
Anterior Surface ◽  
Phakic Intraocular Lens ◽  
High Position

Purpose: To evaluate the position stability of a phakic intraocular lens (Cachet pIOL; Alcon, Laboratories, Inc., Fort Worth, TX) in the anterior chamber (AC) during a 6-months follow-up. Methods: Thirty eyes of 16 subjects underwent a Cachet pIOL implantation for the correction of high myopia from -6.50 to -16.00 D with plano targeted refraction. The position stability of the Cachet pIOL was evaluated using an Anterior Segment-OCT (AS-OCT, Carl Zeiss AG, Oberkochen, Germany) at 1- and 6-months postoperatively. Three measurements have been taken into account: 1) the minimum distance between the anterior surface of the Cachet pIOL optic disk and the central corneal endothelium; 2) the minimum distance between the optic disk’s edges of the pIOL and the endothelium; 3) the minimum distance between the posterior surface of the pIOL optic disk and the anterior surface of the crystalline lens. The endothelial cell density (ECD) was also recorded. Results: No statistically significant changes of the Cachet pIOL position in the AC were found during follow-up. The average changes were ≤0.1 mm between 1- and 6-months postoperatively (P>0.05). At the end of follow-up, The mean ECD loss was 0.7 % (from 2794 ± 337 cell/mm2 to 2776 ± 388 cell/mm2; P>0.05). Conclusion: A high position stability of the Cachet pIOL in the anterior chamber was shown during a 6-months follow-up.

Keratometry, biometry, and prediction of intraocular lens power in adult tigers (Panthera tigris)

2021 ◽  
pp. 1-7
Author(s):  
Cameron D. Owens ◽  
Tammy M. Michau ◽  
Justin Boorstein ◽  
Elizabeth R. Wynn ◽  
Richard J. McMullen
Keyword(s):  
Anterior Chamber ◽  
Intraocular Lens ◽  
Anterior Chamber Depth ◽  
Crystalline Lens ◽  
Applanation Tonometry ◽  
Normal Adult ◽  
Panthera Tigris ◽  
Clinically Normal ◽  
Iol Power ◽  
Lens Power

Abstract OBJECTIVE To calculate the necessary pseudophakic intraocular lens (IOL) power to approximate emmetropia in adult tigers. ANIMALS 17 clinically normal adult tigers. PROCEDURES 33 eyes of 17 clinically normal adult tigers underwent routine ophthalmic examination and B-scan ultrasonography while anesthetized for unrelated procedures. Specific ultrasound data (globe measurements and corneal curvature) and estimated postoperative IOL positions were utilized to calculate predicted IOL power by use of Retzlaff and Binkhorst theoretical formulas. Applanation tonometry and refraction were also performed. RESULTS Mean ± SD axial globe length was 29.36 ± 0.82 mm, preoperative anterior chamber depth was 7.00 ± 0.74 mm, and crystalline lens thickness was 8.72 ± 0.56 mm. Mean net refractive error (n = 33 eyes) was +0.27 ± 0.30 diopters (D). By use of the Retzlaff formula, mean predicted IOL power for the postoperative anterior chamber depth (PACD), PACD – 2 mm, and PACD + 2 mm was 43.72 ± 4.84 D, 37.62 ± 4.19 D, and 51.57 ± 5.72 D, respectively. By use of the Binkhorst equation, these values were 45.11 ± 4.91 D, 38.84 ± 4.25 D, and 53.18 ± 5.81 D, respectively. Mean intraocular pressure for all eyes was 14.7 ± 2.69 mm Hg. CLINICAL RELEVANCE The calculated tiger IOL was lower than reported values for adult domestic felids. Further studies evaluating actual PACD and pseudophakic refraction would help determine the appropriate IOL power to achieve emmetropia in this species.

Stabilization of the position of the intraocular lens in cataract surgery against the background of lens subluxation

2020 ◽  
Author(s):  
Y.V. Belonozhenko ◽  
◽  
E.L. Sorokin ◽  
Keyword(s):  
Cataract Surgery ◽  
Intraocular Lens ◽  
Lens Subluxation

Монография посвящена изучению возможностей профилактики послеоперационной спонтанной дислокации комплекса «ИОЛ – капсульный мешок» при выполнении факоэмульсификации в глазах с сочетанием возрастной катаракты и инволюционного подвывиха хрусталика первой степени. Авторами изучены степени тяжести и исходы спонтанной дислокации комплекса «ИОЛ – капсульный мешок» нетравматического генеза после выполнения неосложненной факоэмульсификации, частота инволюционного подвывиха хрусталика первой степени у пациентов с возрастной катарактой перед выполнением факоэмульсификации; технические особенности, интра- и послеоперационные осложнения выполнения факоэмульсификации при инволюционном подвывихе хрусталика первой степени; ближайшая и отдаленная эффективность стабильности положения ИОЛ РСП-3 после выполнения факоэмульсификации катаракты, сочетающейся с инволюционным подвывихом хрусталика первой степени, разработаны показания к выполнению имплантации ИОЛ РСП-3 по собственной технологии и уточнены противопоказания; разработана хирургическая технология имплантации ИОЛ модели РСП-3, обеспечивающая стабильность анатомического положения ИОЛ при факоэмульсификации катаракты, сочетающейся с инволюционным подвывихом хрусталика первой степени, позволяющая минимизировать число спонтанных дислокаций комплекса «ИОЛ – капсульный мешок» в различные сроки послеоперационного периода факоэмульсификации. Книга рассчитана на врачей-офтальмологов, офтальмохирургов, интернов, клинических ординаторов, аспирантов.

scholarly journals The simply modified intrascleral fixation using round flange (SMURF) technique for intrascleral intraocular lens fixation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Soa Kim ◽  
Jee Taek Kim
Keyword(s):  
Intraocular Lens ◽  
Invasive Procedure ◽  
Crystalline Lens ◽  
Early Postoperative Period ◽  
Cystoid Macular Oedema ◽  
Modified Technique ◽  
Intraocular Pressure Elevation ◽  
Wound Leakage ◽  
Iol Dislocation

AbstractWe describe a simply modified intrascleral fixation using round flange (SMURF) technique and report the clinical outcomes of the surgery. Forty-one eyes of 41 consecutive patients, with intraocular lens (IOL) dislocation, crystalline lens subluxation, and zonular weakness, who underwent surgery using the SMURF technique were included. The modified technique included the use of a conventional 27-gauge needle, a non-bent needle, oblique sclerotomy, direct threading of the leading haptic, and simple placement of the following haptic. IOLs were successfully placed and showed good centring. There were no cases of wound leakage or hypotony during the early postoperative period. Postoperative complications included vitreous haemorrhage in one eye (2.4%), intraocular pressure elevation in one eye (2.4%), and iris capture in six eyes (14.6%). There were no cases of postoperative retinal detachment, cystoid macular oedema, endophthalmitis, or IOL dislocation during the follow-up period. We proposed a few modifications in the intrascleral flanged technique for IOL fixation. The modified technique is a simple, easy, and minimally invasive procedure for successful IOL intrascleral fixation.

scholarly journals Iris-Claw Intraocular Lens: Anterior Chamber or Retropupillary Implantation? A Systematic Review and Meta-Analysis

Medicina ◽  
2021 ◽  
Vol 57 (8) ◽  
pp. 785
Author(s):  
I-Chia Liang ◽  
Yun-Hsiang Chang ◽  
Adrián Hernández Hernández Martínez ◽  
Chi-Feng Hung
Keyword(s):  
Anterior Chamber ◽  
Intraocular Lens ◽  
Meta Analysis ◽  
Secondary Outcome ◽  
Controlled Trials ◽  
Cochrane Central Register ◽  
Randomized Controlled ◽  
Cell Counts ◽  
Iop Elevation ◽  
Iris Claw

Background and Objectives: Iris-claw intraocular lens (ICIOL) could be implanted in the anterior chamber (AC) or retropupillary (RP) in eyes lacking capsular and/or zonular support. Several studies have focused on comparing the efficacy and complications of these two techniques and we designed this research to review the published literatures. Materials and Methods: Peer-reviewed studies were collected through network databases (PubMed, Scopus, Cochrane Central Register of Controlled Trials, and ClinicalTrials.gov) and analyzed. The primary outcome was the standardized mean differences (SMDs) of pre- and post-operative corrected distant visual acuity (CDVA). The secondary outcome was the SMDs of pre- and post-operative intraocular pressure (IOP), endothelial cell counts (ECC), and the odds ratios (ORs) of post-operative IOP elevation and cystoid macular edema (CME). Comprehensive Meta-Analysis software was utilized to conduct statistical analysis. Results: Six studies (one randomized controlled trial and five retrospective case series) were relevant and included a total of 516 eyes (255 and 261 eyes in the AC ICIOL and RP ICIOL groups, respectively). The quantitative analysis showed no significant differences in CDVA (SMD: 0.164, 95% confidence interval (CI): −0.171 to 0.500), ECC (SMD: −0.011, 95% CI: −0.195 to 0.173), and IOP elevation events (OR: 0.797, 95% CI: 0.459 to 1.383). Lesser IOP reduction (SMD: 0.257, 95%CI: 0.023 to 0.490) and a relative increase in the incidence of CME (OR:2.315, 95% CI: 0.950 to 5.637) were observed in the AC ICIOL group compared with RP ICIOL group. Conclusions: Our meta-analysis indicated that AC and RP ICIOL seem to have equivalent visual outcomes. RP ICIOL may perform slightly better with more IOP reduction and lesser CME. More randomized controlled trials, which have higher patient participation and more outcomes are needed to confirm our conclusions.

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