Journal Article

Vertical implantable collamer lens as a novel method to increase rotational stability

Auffarth, Gerd U., Moon, Kun, Lee, Yongwoo, Khoramnia, Ramin, Lee, Jong Ho, Son, Hyeck-Soo, An, Sang Il, Choi, Chul Young, Han, Sang Beom, Lee, Je Myung

2024

Overview

We investigated the vertical implantation of a toric implantable collamer lens (ICL) and compared the rotational stability with that of horizontal implantation. This matched comparative study retrospectively reviewed and analyzed data from patients who underwent ICL implantation from 2003-2022 by 1:1 matching vertical and horizontal (V and H toric groups, respectively) implantation patients according to preoperative astigmatism, spherical equivalent, sulcus-to-sulcus, anterior chamber depth, and ICL size. Visual acuity, manifest refraction, vaulting, and rotation were measured 3 months postoperatively. We included 646 eyes (323 each in the V and H toric groups). No statistically significant difference was observed between groups in postoperative visual acuity, refractive error, and astigmatism. Vaulting was lower in the V toric group. (P < 0.001). The mean lens rotation in the V toric group was less than that in the H toric group (1.11 ± 2.84° versus 3.02 ± 10.34°, P = 0.001). The proportion of eyes in the V and H toric groups showing ≥10° of rotation was 2.5% (8 eyes) and 6.5% (21 eyes), respectively (P = 0.014). Despite repositioning from rotation, three (0.9%) and eight (2.5%) eyes required removal owing to lens re-rotation in the V and H toric groups, respectively. Toric ICL vertical implantation showed good rotational stability, and appropriate visual acuity correction results with relatively low vaulting. This procedure therefore presents an effective novel method that could replace horizontal toric ICL implantation.

• Publisher: Public Library of Science,Public Library of Science (PLoS)
• Subject: Acuity / Adult / Anterior chamber / Astigmatism / Astigmatism - physiopathology / Astigmatism - surgery / Biology and Life Sciences / Cataracts / Comparative studies / Contact lenses / Cornea / Engineering and Technology / Eye lens / Female / Humans / Implantation / Implants, Artificial / Laboratories / Lens Implantation, Intraocular - methods / Lenses / Male / Manufacturers / Medicine and Health Sciences / Middle Aged / Myopia / Myopia - physiopathology / Myopia - surgery / Patients / Phakic Intraocular Lenses / Prosthesis / Refraction, Ocular - physiology / Retrospective Studies / Rotation / Social Sciences / Stability / Statistical analysis / Viscoelasticity / Visual acuity / Visual Acuity - physiology / Visual observation / Young Adult