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The clinical efficacy of Haigis formula using A-scan contact ultrasound biometry

Poster Details

First Author: J.Lee SOUTH KOREA

Co Author(s):                  

Abstract Details


To investigate the accuracy of the Haigis formula compared to other formulas using contact ultrasound biometry.


Department of Ophthalmology, School of Medicine, Pusan National University & PNUH, Pusan. South Korea


This study was performed on 91 patients, 110 eyes who underwent cataract surgery in our hospital. Axial length (AXL), Anterior chamber depth (ACD) were measured with both A-scan and IOL Master. Patients were divided into 3 groups based on AXL; Group I (AXL<23.0mm), Group II (23.0mm≤AXL<26.0mm), Group III (AXL≥26.0mm). Before cataract surgery, predicted refraction was calculated using the Haigis, SRK/T, Hoffer Q, and Holladay 1 formulas with both A-scan and IOL Master measurements. Mean absolute error (MAE) were analyzed at 1 month after surgery among various IOL formulas.


Using contact ultrasound biometry, in Group I, MAE of Haigis was 0.84 ± 0.64D and was significantly lower than only SRK/T. In Group II, MAE of Haigis was 0.71 ± 0.53D and was significantly the lowest MAE compared to all other formulas. In Group III, MAE of Haigis was 0.76 ± 1.13D and no significantly different from other formulas. Comparing MAE of A-scan to IOL-Master, Haigis formula showed 0.18D higher error and it became lower when AXL is close to normal range.


Using contact ultrasound biometry, the Haigis formula still provided the best predictability of postoperative refractive outcome compared to all other formulas in the eyes of normal axial length.

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