Clinical research of phakic posterior chamber intraocular lens implantation for high myopia

Abstract

Objective To evaluate the efficacy and safety of the surgical correction of high myopia using a phakic posterior chamber intraocular lens. Methods Forty eyes of 26 patients with high myopia who accepted surgery treatment.Each eye was examined before and after surgery one day,one week,one month,six months and twelve months.The examination included visual acuity,refraction,tonometry, Pentacam, anterior chamber depth,horizontal corneal diameter (white to white),and posterior segment evaluation after indirect ophthalmolscope examination. Results All eyes of preoperative uncorrected visual acuity and best-corrected visual acuity (BCVA) were 0.05+0.02,0.61+0.28 respectively and postoperative were 0.62±0.17,0.62±0.31 respectively.The mean preoperative SE was (-18.95±4.73)D and postoperative SE was (-1.50±0.75)D.The mean preoperative ECD was (2917.42+208.36)/mm2 and postoperative ECD was (2797.03+210.25)/mm2.The mean preoperative IOP was (16.65±4.75)mmHg and postoperative IOP at first day was (15.47±4.36)mmHg.Pentacam showed that preoperative ACD was (3.25+0.27)mm and postoperative ACD reduced to (2.97+0.19)mm. Conclusions The phakic IOLs is an effective treatment for the correction of high myopia and has significant advantages such as reversibility,immediate correction,stability,and relative simplicity.However,long-term studies are necessary to assess the potential risks. Key words: Phakic; Posterior chamber intraocular lens; Myopia