Abstract
Aim: To estimate whether implantable collamer lens (V4c ICL) implantation increases the risk of retinal detachment in high myopia comparing with myopes with Rigid Gas-Permeable (RGP) correction.Methods: This prospective study was comprised of an ICL group (704 eyes) and an RGP group (628 eyes). Patients were enrolled according to the inclusion criteria and exclusion criteria, then divided into the ICL group and RGP group. Patients in the ICL and RGP groups received V4c ICL implantation and RGP fitting respectively. Retinal details, spherical equivalent refraction (SE), uncorrected distance visual acuity (UDVA), corrected distance vision acutivity (CDVA), axis length (AL), anterior chamber depth (ACD) and other relevant parameters were recorded at different time points. Rhegmatogenous retinal detachment (RRD) morbidity and incidence, RRD morphology and relevant parameters were analyzed.Results: All enrolled patients were followed for 3–6 years. Patients characteristics before the refractive procedure did not show a statistical difference. At the end of the follow up, all the RD cases were RRD. The RRD morbidity of the ICL group and RGP group was 1.99% (14 eyes) and 0.96% (6 eyes) respectively, which did not show statistical difference (P = 0.12). During the first year after refractive procedure, the RRD incidence of the ICL group was 0.85% (6/704), while this number of the RGP group was 0.16% (1/628). It did not show statistical difference (P = 0.08).Conclusion: Compared with RGP fitting, V4c ICL implantation for high myopia correction does not add RRD risk in the long term. V4c ICL implantation is a safe method for high myopia correction.
Highlights
Myopia is one of the most common ametropic diseases [1]
All participants were well-informed about advantages and disadvantages of V4c ICL implantation and Rigid GasPermeable (RGP) lenses fitting for the correction of high myopia
All enrolled patients were followed for 3–6 years after the initial refractive procedure. 352 patients (704 eyes) in the ICL group and 315 patients (628 eyes) in the RGP group completed the present research
Summary
Myopia is one of the most common ametropic diseases [1]. In contrast with emmetropic eyes, patients with high myopia have a higher incidence of retinal detachment (RD) [2]. Peripheral iridectomy increased the risk of intraocular inflammatory reaction and hyphema This lengthens the entire treatment period, since patients who undergo pre-operative peripheral iridectomy often have to wait for at least 2 weeks before V4 ICL implantation. To solve these problems, “CentraFLOW Technology” was introduced in the design. It is a single piece posterior chamber phakic refractive intraocular lens designed with a central hole This allows aqueous humor could flow between the anterior and posterior chamber to maintain the normal physiology of the anterior segment of the ocular, eliminating the need of pre-operative peripheral iridectomy. Recent researches have compared V4 and V4c ICL implantation, and confirmed that there was no significant difference in visual quality [5, 6]
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