RESEARCH ARTICLE
Toric Implantable Phakic Contact Lens in the Correction of Stable Keratoconus after Corneal Collagen Crosslinking
Mohamed Salah El-Din Mahmoud1, *, Mohamed Abdel Hamid1, Mohamed Tarek Moustafa1
Article Information
Identifiers and Pagination:
Year: 2022Volume: 16
E-location ID: e187436412208190
Publisher ID: e187436412208190
DOI: 10.2174/18743641-v16-e2208190
Article History:
Received Date: 15/2/2022Revision Received Date: 21/4/2022
Acceptance Date: 23/5/2022
Electronic publication date: 03/11/2022
Collection year: 2022
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Abstract
Background:
The study aims to evaluate the safety profile and efficacy of toric Implantable Phakic Contact Lens (IPCL) in patients with stable keratoconus after corneal collagen crosslinking (CXL).
Methods:
A prospective interventional case series study involving 30 keratoconic eyes between 22 to 39 years of age implanted with toric IPCL 6 months after CXL. The refractive error, visual acuity, corneal endothelium, intraocular pressure (IOP), and adverse effects were observed for 12 months following the implantation.
Results:
The preoperative mean for the sphere was approximately -8.3±3.6, which improved postoperatively by -0.58±0.23 after 1 month, -0.48±0.19 after 3 months, -0.36±0.18 after 6 months, and -0.35±0.2 after 12 months respectively. About the cylinder, the preoperative mean for the cylinder was approximately -3.4±1.6, which improved postoperatively by -1.06±0.3 after 1 month, -0.76±0.19 after 3 months, -0.48±0.28 after 6 months and -0.53±0.12 after 12 months, respectively. The preoperative BCDVA was 0.34±0.13, which increased postoperatively to 0.18±0.11 after 12 months. The mean values for IOP were 14.5±1.5 mm Hg, 15.1±2.09 mm Hg, 13.8±2.2 mmHg, 13.3±1.7 mm Hg, 13.1±1.6 mm Hg at preoperative period, 1 month, 3 months, 6 months and 12 months postoperatively. The mean preoperative endothelial count was 2912.9±111.1 per square millimeter, 2854.7±113.2 cells per square millimeter after 6 months, and 2829.0±112.2 cells per square millimeter after 12 months.
Conclusions:
Toric IPCL is a safe approach for treating residual refractive errors, particularly astigmatism, after 6 months of CXL in patients with stable KCS.
