Accuracy of Intraocular Lens Power in Cataract Patients Underwent Excimer Laser PRK.
- Author:
Hyung Jin DOH
1
;
Woo Jin SAH
;
Yoon Won MYOUNG
;
Tae Won HAHN
;
Jae Ho KIM
Author Information
1. Department of Ophthalmology, Kangnam St.Mary's Hospital, The Catholic University Medical College, Seoul, Korea.
- Publication Type:Original Article
- Keywords:
Excimer laser photorefractive keratectomy;
Empirical formula;
Theoretical formula;
SRK-II formula;
Idem-lens theory
- MeSH:
Cataract*;
Female;
Follow-Up Studies;
Humans;
Lasers, Excimer*;
Lens Implantation, Intraocular;
Lenses, Intraocular*;
Photorefractive Keratectomy;
Retrospective Studies;
Visual Acuity
- From:Journal of the Korean Ophthalmological Society
1999;40(8):2145-2151
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
We retrospectively evaluated postoperative refraction of four patients(five eyes)who received intraocular lens implantation after excimer laser photorefractive keratectomy (PRK).The mean age of the patients was 44.8 years and 3 patients were female and 1 patient was male.The mean interval between PRK and cataract operation was 20.2 months (1 to 45 months)and the mean follow-up time after cataract operation was 16.2 months(2~43months).Phacoemulsification and PMMA-PCL(6.0~6.5 mm)implantation were made in all cases.SRK-II formula,the most popular empirical formula was used in first 3 cases(group I),but Idem-lens formula,a primitive theoretical formula was used in another 2 cases (group II)after occurrence postoperative refraction errors in group I .In group I and II,the mean postoperative refraction error was +3.00 diopters and +0.50 diopters and uncorrected visual acuity at postoperative 2 months was 20/60 and 20/24 respectively.The mean of calculated IOL-power was -3.75 diopter in group I and -0.625 diopter in group II.From these results,the empirical formula is definitely unsuitable for the calculation of IOL power in the cataract operation following excimer laser PRK. Moreover,although a primitive one,Idem-lens theory could be temporally useful for the IOL-power calculation in such cases.In conclusion,new formula is required for the cataract operation following excimer laser PRK.
