Correction od Myopia and Myopic Astigmatism by Implantation of a Phakic Posterior Chamber Implantable Collamer Lens

Purpose. To assess the efficacy, safety, and predictability of the Visian Implantable Collamer Lens (ICL) model having a central port in patients over 40 years of age. Methods. This study included 33 eyes from 21 patients who underwent V4c ICL implantation for the correction of myopia and myopic astigmatism. We assessed uncorrected (UDVA) and corrected (CDVA) distance visual acuity, refraction, intraocular pressure (IOP), endothelial cell density (ECD), vault, and adverse events occurring over a 1-year period. Results. Mean age of the patients at the time of implantation was 43.52 ± 4.49 years (range: 40 to 56 years). Efficacy and safety indexes were 1 and 1.09, respectively. Surgical outcomes for CDVA were as follows: no eye lost any lines, 19 eyes (57.58%) showed no CDVA changes, 7 eyes (21.21%) gained 1 line, 4 eyes (12.12%) gained 2 lines, and 3 eyes (9.09%) gained ≥3 lines. Mean postoperative spherical equivalent (SE) was −0.09 ± 0.47 D. A total of 29 eyes (87.8%) were within ±0.50 D and 31 eyes (93.9%) were within ±1.00 D of the desired SE. At 1-year, mean IOP was 15.27 ± 3.03 mmHg (range: 9 to 20 mmHg, p=0.12 pre vs. post) and mean ECD was 2516 ± 234 cells/mm2 (p=0.29 pre vs. post). Mean postoperative vault was 320 ± 136 μm, with 201–300 μm being the most prevalent vault range for 9 eyes (31.03%). None of the eyes showed a vault >701 μm. There were neither intraoperative nor postoperative complications; in fact, all ICL implantation procedures were uneventful. Conclusions. Our study’s findings support the use of this lens in patients over 40 years of age. A long follow-up period is advisable to monitor ICL position relative to the crystalline lens.

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Techniques and Pearls in the Insertion of the Posterior Chamber Implantable Collamer Lens for Moderate to High Myopia

Techniques in Ophthalmology ◽

10.1097/ito.0b013e31820140b9 ◽

2010 ◽

Vol 8 (4) ◽

pp. 133-136

Author(s):

Kelly L. Hodson ◽

Carol L. Karp

Keyword(s):

High Myopia ◽

Posterior Chamber ◽

Implantable Collamer Lens ◽

Chamber Implantable

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Pseudophakic hyperopia in nanophthalmic eyes managed by a posterior chamber implantable collamer lens

Indian Journal of Ophthalmology ◽

10.4103/0301-4738.77014 ◽

2011 ◽

Vol 59 (2) ◽

pp. 165 ◽

Cited By ~ 2

Author(s):

KulinJ Kothari ◽

PrakashR Nayak ◽

BijalK Mehta

Keyword(s):

Posterior Chamber ◽

Implantable Collamer Lens ◽

Chamber Implantable

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Posterior Chamber Implantable Collamer Lens Icl and Toric Icl

Refractive Surgery ◽

10.5005/jp/books/10723_42 ◽

2009 ◽

pp. 375-375 ◽

Cited By ~ 1

Author(s):

Alaa El-Danasoury

Keyword(s):

Posterior Chamber ◽

Implantable Collamer Lens ◽

Chamber Implantable

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Implanting a posterior chamber phakic intraocular lens in highly myopic eyes with peripheral primary iris and ciliary body cysts

European Journal of Ophthalmology ◽

10.1177/1120672118766445 ◽

2018 ◽

Vol 29 (2) ◽

pp. 171-177 ◽

Cited By ~ 3

Author(s):

Jing Zhao ◽

Dongqiang Luo ◽

Yong Sun ◽

Lingling Niu ◽

Feng Zhao ◽

...

Keyword(s):

Visual Acuity ◽

Ciliary Body ◽

Posterior Chamber ◽

Safety Index ◽

Implantable Collamer Lens ◽

Distance Visual Acuity ◽

Corrected Distance Visual Acuity ◽

Efficacy Index ◽

Chamber Implantable

Purpose: To investigate the safety and efficacy of implanting a posterior chamber implantable collamer lens with a central hole in cases of high myopia with peripheral primary iris or ciliary body cysts. Methods: A total of 37 eyes of 19 patients with primary iris or ciliary body cysts detected by ultrasonic biological microscope were included, with spherical powers of −10.26 ± 3.28 D and cylinder powers of −1.71 ± 1.18 D. Each patient received ultrasonic biological microscope and a routine examination before implantation of the implantable collamer lens. A routine postoperative follow-up was performed to observe changes in the iris or ciliary body cyst, ranging from 3 to 18 months. Results: There were no complications. At the last follow-up, 56.8% (21/37) of eyes achieved the same corrected distance visual acuity as their preoperative measurements, 43.2% of eyes were enhanced by ≥1 line, and no patients’ corrected distance visual acuity declined. The efficacy index and safety index were 0.95 and 1.11, respectively. After 18 months, 66.7% of the spherical equivalents were between ±0.5 D with 100% between ±1.0 D. The postoperative mean spherical equivalents at 1, 3, 6, 12, and 18 months were −0.45 ± 0.31 D, −0.39 ± 0.29 D, −0.36 ± 0.30 D, −0.39 ± 0.38 D, and −0.48 ± 0.23 D (p = 0.789). The vaults were 516 ± 140, 548 ± 124, 498 ± 133, 582 ± 161, and 557 ± 110 μm (p = 0.355). There were no changes in size (p > 0.05), number, or position of the iris or ciliary body cysts. Conclusion: Implantable collamer lens implantation is safe and effective for highly myopic patients with peripheral primary iris and ciliary body cysts. The cysts did not change after operation in this study.

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Clinical and Refractive Outcomes of Toric Phakic Implantable Collamer lens Implantat for correction of myopic astigmatism

AL-Kindy College Medical Journal ◽

10.47723/kcmj.v13i1.129 ◽

2019 ◽

Vol 13 (1) ◽

pp. 70-75

Author(s):

Suzan Amana

Keyword(s):

Crystalline Lens ◽

Posterior Chamber ◽

Implantable Collamer Lens ◽

Corneal Surgery ◽

Refractive Outcomes ◽

Lens Implantation ◽

Positive Linear Correlation ◽

The Mean ◽

Myopic Astigmatism ◽

High Myopic Astigmatism

Background: Currently there are four general approaches to correct refractive errors: refractive corneal surgery, crystalline lens surgery and implantation of an intraocular lens in anterior or posterior chamber. Objective: To evaluate the predictability, safety and stability of toric phakic implantable collamer lens implantation to correct moderate to high myopic astigmatism. in Eye Specialty Private Hospital, Baghdad, Iraq. Type of the Study: a prospective non randomize intervention study. Methods: 60 eyes of 40 patients underwent implantation of a toric implantable collamer lens (V4c design).Mean spherical refraction was ₋11.32 diopter (D) ±3.17 (SD) with range from ₋6.00 to ₋18.00D and the mean cylinder was -2.61(D) ±1.16 with range from ₋1.00 to ₋5.50D .The outcome measures that evaluated during a 12 months follow-up period include UDVA, refractive outcomes, CDVA, vault and adverse events. Results: At 12 months postoperatively the mean Snellen decimal UDVA was 0.77±0.23 and mean CDVA was 0.80±0.21, with an efficacy index 1.16. Twenty nine eyes (48.33%) showed gain in CDVA with safety index 1.21.The treatment was highly predictable for spherical equivalent and astigmatic component .The mean SE dropped from (₋12.63D ±3.11) to ( ₋0.11 D±0.20) with 58 eyes within ±0.50 D and 60 eyes with ± 1.00D of target correction . For achieved cylinder 60 eyes (100%) had ≤0.50D and 51 eyes (85%) had ≤0.25D with strong positive linear correlation between achieved and expected cylinder(r=0.94) Conclusions: The results of the present study support safety, efficacy, predictability of toric implantable collamer lens implantation to treat moderate to high myopic astigmatism.

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