Posterior chamber phakic intraocular lens implantation for correcting high myopia

Abstract

Objective To evaluate the efficacy and safety of implanting a posterior chamber phakic intraocular lens to correct high myopia. Methods There were 117 eyes of 63 patients with high myopia. The range of preoperative myopia diopters was -5.25 - - 19.0D. The best corrected vision was ≥0.8 in 101 eyes and 0.5 - 0.6 in 15 eyes, and 〈 0.3 in one eye, The examine included uncorrected visual acuity （UC- VA） , corrected visual acuity, corneal endothelium, UBM,intraocular pressure, refraction, tonometry, kerame- ter, pachometer, axial length, depth of anterior chamber, horizontal corneal diameter （ white to white ）, and posterior mean evaluation after indirect ophthalmoscope examination. The posterior chamber phakic intraocu- lar lens manufactured with STAAR collamer was implanted though 3.0 mm sutureless temporal clear corneal incision under topical anesthesia. YAG laser peripheral iridectomy was performed before surgery to avoid pu- pil block glaucoma. The follow-up examination included visual acuity, refrection, tonometer, cornea, and space between crystal lens and IOL. Results 117 eyes implanting were successful , all eyes had a signifi- cant increase in uncorrected visual acuity, and a same or better corrected visual acuity, All eyes maintained a low negative power of refraction, but the patients managed most activities without spectacles. 2 case （ 2 eyes） were found cataract genesis under anterior capsular membrane. Conclusion The posterior chamber phakic IOL was predictable, safe, and efficacious in the correction of high myopic. Key words: High myopia ; Surgery ; Lens, artifical; Phakic eye