Long-term observation on safety and visual quality of implantable collamer lens V4c implantation for myopia correction: a 5-year follow-up

AIM: To elucidate the safety and visual quality of implantable collamer lens with central hole (ICL V4c) implantation for correcting moderate high myopia at least 5y. METHODS: This retrospective study was conducted on 58 patients (114 eyes) who were followed up 5y after ICL V4c implantation. The observation done before 1d, 1mo, 1 or more surgical procedure. acuity, subjective refraction, intraocular pressure, vault, axial length, position, pupil diameter, quality, adverse events analyzed. includes aberration, modulation transfer function cutoff frequency (MTF cutoff), objective scattering index (OSI), Stroller's ratio (SR), questionnaire. RESULTS: average follow-up period 69.25±3.80mo (range 60–82mo) preoperative spherical equivalent (SE) -8.66±1.97 D. At operation, 1.01±0.02 efficacy 0.99±0.42 SE -0.65±0.63 59.6% eyes achieved an uncorrected distance acuity 20/20, 76.3% had within ±1.0 D last visit. length increased by 0.29±0.71 mm surgery (t=-3.843, P<0.001). mean vault 510.59±245.61 μm. temporal side in 80 (84.2%). questionnaire showed that 98.2% satisfied Adverse occurred 4 (3.5%), including posttraumatic toric rotation (2 eyes), iris incarceration (1 eye), displacement eye) follow-up. CONCLUSION: Long-term is safe, effective, stable to myopia, excellent satisfactory, but progression still needs attention surgery.