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KMID : 0360220220630090747
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Journal of the Korean Ophthalmological Society
2022 Volume.63 No. 9 p.747 ~ p.753
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Comparison of the Optimized Intraocular Lens Constants Calculated by Automated and Manifest Refraction for Korean
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Eom Young-Sub
Lim Dong-Hui
Kim Dong-Hyun
Byun Yong-Soo
Na Kyung-Sun
Kim Seong-Jae
Rho Chang-Rae
Chung So-Hyang
Lee Ji-Eun
Cho Kyong-Jin
Chung Tae-Young
Kim Eun-Chul
Shin Young-Joo
Lee Sang-Mok
Cho Yang-Kyung
Yoon Kyung-Chul
You In-Cheon
Ko Byung-Yi
Kim Hong-Kyun
Song Jong-Suk
Lee Do-Hyung
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Abstract
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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.
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KEYWORD
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Autorefraction, Constants, Intraocular lens, Manifest refraction, Optimization
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