Abstract
BackgroundTo assess the clinical outcomes of the Visian Implantable Collamer Lens (ICL) with a central port throughout 7 years of follow-up.MethodsEighty-four eyes of 52 patients were evaluated over a follow-up period of 7 years after V4c ICL implantation. Uncorrected (UDVA) and corrected (CDVA) distance visual acuities, refraction, intraocular pressure (IOP), endothelial cell density (ECD) and vault were analysed.ResultsThe mean postoperative UDVA (logMAR) was 0.04 ± 0.11, 0.13 ± 0.19 and 0.17 ± 0.23 at 1-, 5- and 7-years, respectively (P < 0.0001). The mean CDVA (logMAR) remains unchanged throughout a 7-year follow-up period (0.02 ± 0.08 and 0.02 ± 0.08, at 5- and 7-years, respectively, P = 0.2). At all follow-up visits, more than 95% of the eyes achieved a CDVA of 20/25 or better and more than 85% a CDVA of 20/20. At the end of the follow-up (7 years), no eye lost more lines of CDVA, 56 eyes (66.7%) and 28 eyes (33.3%) gained lines of CDVA. At 7-years, the spherical equivalent was − 0.62 ± 0.62 D. No significant increase in IOP (> 20 mmHg or an increase higher than 5 mmHg) occurred in any case throughout the 7-year of follow-up. The loss in ECD from the preoperative baseline at the last follow-up visit was 2.6%. No intraoperative or postoperative complications or adverse events occurred during the follow-up period.ConclusionsThe outcomes of this study show the long-term viability of the V4c ICL implantation as a surgical option for the correction of myopia.
Highlights
To assess the clinical outcomes of the Visian Implantable Collamer Lens (ICL) with a central port throughout 7 years of follow-up
The inclusion criteria were stable refraction with a myopic error in the range correctable with the V4c ICL, a clear central cornea, anterior chamber depth (ACD) greater than 2.8 mm measured from the corneal endothelium to the anterior lens capsule, endothelial cell density (ECD) greater than 2000 cells/ mm2, mesopic pupil smaller than 7.0 mm, trabecular-iris angle (TIA) greater than 35°, crystalline lens rise (CLD) less than 500 μm and postoperative follow-up period of at least 7 years
ICL size was individually determined based on the horizontal white-to-white (WTW) distance, ACD measured by Scheimpflug photography, and angle-to-angle distance measured with optical coherence tomography (OCT)
Summary
To assess the clinical outcomes of the Visian Implantable Collamer Lens (ICL) with a central port throughout 7 years of follow-up. The reported incidence of cataracts, which is the most common and significant complication with the previous model [4], has been reduced to almost 0 with the V4c model [1, 5], even for those cases with a low vault [6] These findings support the idea that aqueous humour flow through the Fernández-Vega-Cueto et al Eye and Vision (2021) 8:23 central hole of the lens maintains the normal physiology of the anterior segment of the eye, preventing potential complications. It should be confirmed whether, over a longer follow-up, those changes in lens density will lead to a clinically significant cataract
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