Preliminary results of a new intrastromal corneal ring segment as a tissue saving procedure in photorefractive keratectomy to correct moderate to high myopia  

作　　者：Sandro Coscarelli Pablo Rodrigues Guilherme Rocha Leonardo Torquetti 

机构地区：[1]Ennio Coscarelli Eye Clinic,Belo Horizonte 30140-001,Brazil [2]Escola Paulista de Medicina,Sao Paulo 04023-062,Brazil [3]Hospital de Olhos de Brasilia,Brasilia 70200-670,Brazil [4]Center of Excellence in Ophthalmology,Para de Minas 35660-051,Brazil

出　　处：《International Journal of Ophthalmology(English edition)》2020年第12期1955-1960,共6页国际眼科杂志（英文版）

基　　金：Supported by Ennio Coscarelli Eye Clinic。

摘　　要：AIM:To evaluate the clinical results after implantation of a new intrastromal corneal ring segment(ICRS)associated with photorefractive keratectomy(PRK)to correct high myopia(HM)patients with thin corneas.METHODS:We evaluated 42 eyes of 23 HM patients that had ICRS implantation followed by PRK.The mean age of patients was 29.1±7.12 y(range 18 to 40 years old).Uncorrected visual acuity(UCVA),best corrected visual acuity(BCVA),keratometry,spherical equivalent,pachymetry,and aberrometry were compared using ANOVA with repeated measurements evaluated preoperatively and at last follow-up visit after the procedures.The refractive predictability and simulated/real corneal ablation were also assessed.RESULTS:The mean follow-up time after PRK was 6.8±1.6 mo.The mean preoperative UCVA improved from 20/800 preoperative to 20/100 after ICRS and 20/35 after PRK.The mean preoperative BCVA was 20/25(range from 20/30 to 20/20)and remained unchanged after ICRS implantation.Following the PRK the mean BCVA was 20/25(range from 20/30 to 20/20).The mean spherical equivalent decreased from-7.25±1.12(range-5.00 to-9.00)preoperatively to-3.32±1.0(range-2.00 to-5.00)postoperatively(P<0.001)after ICRS implantation and decreased from-2.44±1.51 preoperatively to 0.32±0.45(range-0.625 to 0.875)postoperatively(P<0.001)after PRK.The change in BCVA and topographic astigmatism was statistically significant(P<0.0001).CONCLUSION:ICRS in HM associated with PRK can be a tissue saving procedure and an alternative surgical option for correction of moderate to high myopia.

关 键 词：high myopia intrastromal corneal ring segments photorefractive keratectomy 

分 类 号：R779.6[医药卫生—眼科]