J Korean Ophthalmol Soc > Volume 55(12); 2014 > Article
Journal of the Korean Ophthalmological Society 2014;55(12):1793-1799.
DOI: https://doi.org/10.3341/jkos.2014.55.12.1793    Published online December 15, 2014.
The Clinical Efficacy of the Haigis Formula Using A-Scan Contact Ultrasound Biometry.
Keun Heung Park, Young Mo Cho, Jong Soo Lee
1Department of Ophthalmology, Pusan National University Hospital, Pusan National University School of Medicine, Busan, Korea. jongsool@pusan.ac.kr
2Department of Emergency Medicine, The Armed Forces Medical Command, Seongnam, Korea.
접촉식 안초음파를 이용한 하기스 공식의 임상적 유용성
박건형1⋅조영모2⋅이종수1
Department of Ophthalmology, Pusan National University Hospital, Pusan National University School of Medicine1, Busan, Korea
Department of Emergency Medicine, The Armed Forces Medical Command2, Seongnam, Korea
Abstract
PURPOSE
To investigate the accuracy of the Haigis formula compared to other formulas using contact ultrasound biometry. METHODS: This study was performed on 94 patients (114 eyes) who underwent cataract surgery in our hospital. Axial length (AXL) and anterior chamber depth (ACD) were measured using both A-scan and intraocular lens (IOL) Master(R). Patients were divided into three groups based on AXL; Group I (AXL < 22.5 mm), Group II (22.5 mm < or = AXL < 25.5 mm), and Group III (AXL > or = 25.5 mm). Before cataract surgery, predicted refraction was calculated using the Haigis, SRK/T, Hoffer Q, and Holladay 1 formulas using both A-scan and IOL Master(R) measurements. Mean absolute error (MAE) were analyzed at one month after surgery using the various IOL formulas. RESULTS: Using contact ultrasound biometry, in Group I, MAE of Haigis was 0.80 +/- 0.67 D and was significantly lower than that using SRK/T. In Group II, the Haigis MAE was 0.72 +/- 0.55 D and was significantly lower than the results of all other formulas. In Group III, the Haigis MAE was 0.76 +/- 1.13 D and not significantly different from the results of other formulas. Comparing MAE of A-scan to IOL Master(R), the Haigis formula showed 0.16 D higher error that decreased when the AXL was close to the normal range. CONCLUSIONS: Using contact ultrasound biometry, the Haigis formula provided the best predictability of postoperative refractive outcome compared to other formulas in eyes with normal axial length.
Key Words: A-scan;Axial length;Cataract;Haigis formula;IOL formulas


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