Comparing the prediction of refractive error with different intraocular lens calculation formulas in cataract surgery with short axial length

Session Details

Session Title: Presented Poster Session: Cataract Surgery Special Cases

Venue: Poster Village: Pod 1

First Author: : K.Kim SOUTH KOREA

Co Author(s): :    Y. Lee   H. Hwang   K. Hwang   B. Kim   S. Song           

Abstract Details

Purpose:

To compare the prediction refractive error with 4 different methods and 11 combination methods in the cataract surgery of eyes with short axial length.

Setting:

Kim’s Eye Hospital, Konyang University College of Medicine, Seoul, South Korea.

Methods:

74 eyes with short axial length (≤ 22.0mm) who had simple cataract surgery were reviewed retrospectively. Difference between postoperative manifest refraction (MR) and prediction refractive error (PRE) of three different conventional formula methods (SRK-T, Hoffer-Q, Haigis) and newly developed methods (Hill-RBF) were collected. The PRE and absolute prediction refractive error (APE) were compared and intraclass correlation coefficient (ICC) between predictive refraction and postoperative spherical equivalent was calculated. Proportion of low APE (≤0.5D) eyes were compared among 4 methods and 11 combination methods. Factors that probably affected to PRE was analyzed.

Results:

PRE of all methods had myopic error except Haigis. Hoffer-Q produced the most myopic error and statistically significant (P<0.05). SRK-T, Hill-RBF was myopic in order. APE was the highest in Hoffer-Q and the lowest in Hill RBF. ICC value was the highest in Hill RBF and the lowest in SRK-T. The proportion of eyes with low APR (≤0.50D) was the highest in Hill-RBF. SRK-T and Haigis combination produced the lowest APE among all combination methods. IOL power was significantly affected to PRE of SRK-T and Steep keratometry was significantly affected to PRE of Haigis and Hill RBF.

Conclusions:

New version of Hill RBF showed the better visual acuity prediction and could be helpful in improving the result of cataract surgery with short axial length. Considering of combining the multiple IOL power calculation methods is essential for successful cataract surgery in the eyes with short axial length.

Financial Disclosure:

None