Cataract surgery and intraocular lens power calculation after radial keratotomy:analysis of 8 cases
10.3969/j.issn.1673-4254.2015.07.21
- VernacularTitle:放射状角膜切开术术后白内障手术及人工晶状体度数选择
- Author:
Yu LI
1
;
Yali LIU
;
Yuchuan CHEN
;
Man LI
;
Lu LONG
Author Information
1. 四川大学华西第四医院眼科
- Keywords:
radial keratotomy;
cataract;
intraocular lens power calculation
- From:
Journal of Southern Medical University
2015;(7):1043-1046
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the clinical characteristics of cataract surgery after radial keratotomy (RK) and appropriate calculation of intraocular lens (IOL) power. Methods Eight patients with cataract (12 eyes) after RK were treated in our hospital from March, 2010 to June, 2013. The visual acuity, keratometric power and length of the ocular axis were examined before the operation. For each patient, 3 groups of corneal curvature values were measured using a automatic keratometer (TOPCON-KR8800) and the minimal K value was selected. Myopic or hyperopic posterior chamber IOL (-1.00 to-2.00 D) were selected based on automatic calculations with SRK-T. Phacoemulsification and IOL implantation were then performed, and the patients were followed up for visual acuity and refractive statuses at 3 months after the operation. Results All the 12 operated eyes showed improved visual acuity after the operation. The uncorrected visual acuity reached 0.8 to 1.0 in 6 eyes and 0.4 to 0.6+ in the other 6, with a corrected visual acuity ranging from 0.6 to 1.0. The refractive status after operations was nearly emmetropic (+0.75 to-1.00 D) in 6 eyes and myopic in the other 6 (-1.00 to-2.50 D). Conclusions Phacoemulsification and IOL implantation is feasible in cataract patients with previous RK. Selecting the minimal K values for central corneal curvature and calculation of the IOL power using the SRK T equation with a reservation of-1.00 to-2.00 D can better ensure the safety of the procedure and avoid the occurrence of hyperopia>+3.00D.
