Posterior Chamber Phakic Intraocular Lenses for the Correction of Myopia: Factors Influencing the Postoperative Refraction

Posterior chamber phakic intraocular lens implantation is a refractive technique for the correction of myopia. This study aimed to identify those factors contributing variability in postoperative refraction. Methods: retrospective evaluated 73 eyes (one eye per patient) implanted with myopic implantable collamer lenses (ICL). Eyes were divided into two groups, low group (LMG) (ICL > −9.5 DS) and high (HMG) ≤ DS), compare predictability, efficacy index, refraction between groups. The association anatomical, demographic, optical features was assessed through correlation analysis investigated using ray-tracing. Results: Postoperative at 3 months whole close emmetropia −0.02 ± 0.37 DS, LMG tended toward myopia HMG, hyperopia. results showed that 65% 54% had within ±0.25 respectively, both 100% ±1.00 DS. ICL higher index HMG (1.13 0.15) than (1.04 0.15). positively associated vault (R = 0.408) negatively correlated power −0.382). Conclusion: predictability effectiveness wide range myopias. Considering expected including accurate vertex measurements would contribute improving results.