Use of low-vault posterior chamber collagen copolymer phakic intraocular lenses for the correction of myopia: a 3-year follow-up.

Abstract

Phakic intraocular lens (pIOL) models have indicated an association between cataract formation and inadequate vaulting. In this study, the efficacy and safety of low-vault posterior chamber pIOLs in the correction of myopia were examined over 3years. From 316 patients undergoing surgery, 14 eyes with a low vault (≤ 150μm) were examined from 14 patients. After implanting the Visian Implantable Collamer pIOL for the correction of myopia (moderate and high), the pIOL vault, endothelial cell loss, uncorrected distance visual acuity (UDVA), corrected DVA (CDVA), and detrimental events were examined over 3years. Based on the findings, the mean spherical equivalent reduced from - 8.15 ± 3.29 before surgery to - 1.02 ± 0.75 diopters 3years after the surgery. In terms of visual outcomes, the mean UDVA (Log MAR) significantly increased from 0.95 ± 037 to 0.27 ± 0.28, and the mean CDVA also increased from 0.99 ± 0.11 to 0.06 ± 0.08 (P < 0.05). The mean indices of safety and efficacy were respectively 1.075 and 0.748. The eyes lost not more than two visual acuity lines. Based on the findings, 82% achieved 0.80 or better CDVA, while the total endothelial cell loss was 7.96% during 3years. Overall, vision-threatening conditions were not reported. The introduced pIOL can be considered a safe and efficient method for myopia at moderate to high levels.