Objective: To investigate the change of retinal image magnification and its relationship to post-operative best corrected visual acuity (BCVA) after implanting phakic anterior chamber intraocular lens for extreme high myopia.
Methods: 30 eyes in 23 patients with -15.13 to -29.00 Diopter (D) of myopia were implanted. The magnification change of retinal image was calculated with ZEMAX software. The relationship among myopic diopter, magnification change, BCVA, and post-operative BCVA improvement were analyzed.
Results: The post-operative BCVA improved by 1 or more lines in 28 of 30 eyes (93%) at 3 months. 2 eyes (7%) no change of BCVA. There was positive correlations between myopic diopter and magnification change (r = 0.996, P < 0.01), and magnification change and post-operative BCVA improvement (r = 0.42, P = 0.02). There was negative correlations between myopic diopter and pro-operative BCVA (r = -0.62, P < 0.01), and post-operative BCVA (r = -0.57, P < 0.01).
Conclusion: Magnification change was one of reason for post-BCVA improvement. There is a positive correlation between Magnification change and post-BCVA improvement.