Refractive Eerror According to the Anterior Chamber Depth and Corneal Refractive Power in Short Eyes.

Shin, Jeong Ah; Hwang, Kyu Yeon; Kim, Man Soo

doi:2013.54.1.65

J Korean Ophthalmol Soc > Volume 54(1); 2013 > Article

Original Article

Journal of the Korean Ophthalmological Society 2013;54(1):65-71.
DOI: https://doi.org/10.3341/jkos.2013.54.1.65 Published online January 15, 2013.

Refractive Eerror According to the Anterior Chamber Depth and Corneal Refractive Power in Short Eyes.

Jeong Ah Shin, Kyu Yeon Hwang, Man Soo Kim

Department of Ophthalmology and Visual Science, Seoul St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea. mskim@catholic.ac.kr

짧은 안축장에서 백내장수술 후 굴절오차 분석과 각막굴절력 및 전방깊이에 따른 정확성 분석

신정아⋅황규연⋅김만수

Department of Ophthalmology and Visual Science, Seoul St. Mary’s Hospital,
The Catholic University of Korea College of Medicine, Seoul, Korea

Abstract

PURPOSE
To evaluate the accuracy of the chosen formula in short eyes and the effect of the anterior chamber depth (ACD) and corneal refractive power on the accuracy. METHODS: A total of 251 eyes out of 185 patients (axial length below 22.0 mm) who underwent cataract surgery in our hospital were retrospectively studied. Introcular lens (IOL) power was calculated with the Hoffer Q, SRK II, SRK-T and Holladay 1 formulas and refractive outcome was measured. Patients were divided into 2 groups based on ACD. The accuracy of the 4 formulas was compared and the errors according to the ACD were also evaluated. RESULTS: In eyes with short axial lengths, all formulas showed a tendency for hyperopic shifts. The Hoffer Q formula showed significantly high predictive accuracy. This tendency for hyperopic shifts was similar in the eyes with extremely short axial length, but a large refractive error deviation was observed. The 2 groups based on ACD showed no significant difference in the refractive error, but the group with deep ACD had a tendency for hyperopic shifts. The difference of the calculated IOL power between the 4 formulas was more pronounced in eyes with lower corneal refractive power. CONCLUSIONS: In eyes with short axial lengths, preoperative ACD and corneal refractive power had an influence on the accuracies of predicted IOL power. Therefore, these factors should be considered in IOL power determination.

Key Words: Anterior chamber depth;Axial length;Corneal refractive power;Intraocular lens power calculation;Refractive outcome