Comparison of the Optimized Intraocular Lens Constants Calculated by Automated and Manifest Refraction for Korean
10.3341/jkos.2022.63.9.747
- Author:
Youngsub EOM
1
;
Dong Hui LIM
;
Dong Hyun KIM
;
Yong-Soo BYUN
;
Kyung Sun NA
;
Seong-Jae KIM
;
Chang Rae RHO
;
So-Hyang CHUNG
;
Ji Eun LEE
;
Kyong Jin CHO
;
Tae-Young CHUNG
;
Eun Chul KIM
;
Young Joo SHIN
;
Sang-Mok LEE
;
Yang Kyung CHO
;
Kyung Chul YOON
;
In-Cheon YOU
;
Byung Yi KO
;
Hong Kyun KIM
;
Jong Suk SONG
;
Do Hyung LEE
Author Information
1. Department of Ophthalmology, Korea University College of Medicine, Seoul, Korea
- Publication Type:Original Article
- From:Journal of the Korean Ophthalmological Society
2022;63(9):747-753
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
Purpose:To derive the optimized intraocular lens (IOL) constants from automated and manifest refraction after cataract surgery in Korean patients, and to evaluate whether there is a difference in optimized IOL constants according to the refraction method.
Methods:This retrospective multicenter cohort study enrolled 4,103 eyes of 4,103 patients who underwent phacoemulsification and in-the-bag IOL implantation at 18 institutes. Optimized IOL constants for the SRK/T, Holladay, Hoffer Q, and Haigis formulas were calculated via autorefraction or manifest refraction of samples using the same biometry and IOL. The IOL constants derived from autorefraction and manifest refraction were compared.
Results:Of the 4,103 eyes, the majority (62.9%) were measured with an IOLMaster 500 followed by an IOLMaster 700 (15.2%). A total of 33 types of IOLs were used, and the Tecnis ZCB00 was the most frequently used (53.0%). There was no statistically significant difference in IOL constants derived from autorefraction and manifest refraction when IOL constants were optimized with a large number of study subjects. On the other hand, optimized IOL constants derived from autorefraction were significantly smaller than those from manifest refraction when the number of subjects was small.
Conclusions:It became possible to use the IOL constants optimized from Koreans to calculate the IOL power. However, if the IOL constant is optimized using autorefraction in a small sample group, the IOL constant tends to be small, which may lead to refractive error after surgery.
