Posters

Factor analysis of postoperative refractive error in cataract surgery with high myopia

Poster Details

First Author: K.Kim SOUTH KOREA

Co Author(s):    K. Koh   K. Hwang   Y. Kwon   B. Kim   S. Song        

Abstract Details

Purpose:

To evaluate factors affecting the postoperative refractive error in cataract surgery with high myopia using a partial coherence interferometry (IOL Master®) and Scheimpflug analyzer (Sirius®)

Setting:

Myung-Gok Eye Research Institute, Department of Ophthalmology, Kim’s Eye Hospital, Konyang University College of Medicine, Seoul, South Korea

Methods:

A retrospective chart review was done on 74 eyes with minus diopter (-10.0~-1.0 diopter, group A) intraocular lens implantation(IOL) and 83 eyes with low diopter (0~10.0 diopter, group B) IOL. The IOL power was calculated using the SRK-T formula, and Superflex Aspheric 920H (Rayner, England) IOL was implanted in all cases. We evaluated pre-operative target refraction, post-operative refraction at the sixth month, pre-operative and post-operative visual acuity. The relationships among axial length (AL), anterior chamber depth (ACD), corneal keratometry (K), the diopter of IOLs and refractive error were analyzed.

Results:

The postoperative best corrected visual acuity was improved significantly in both groups (p<0.05). The mean postoperative hyperopic refractive error compared to the preoperative target refraction was 1.67±0.19D in group A and 0.80±0.07D in group B (p<0.05). The axial length (Pearson's correlation coefficient, r=0.280 in group A, r=0.260 in group B) and ACD (Pearson's correlation coefficient, r=0.133 in group A, r=0.263 in group B) were significant positive correlation with the larger hyperopic error in both group. However, the keratometry (Pearson's correlation coefficient, r=0.479) was significant positive correlation with the larger hyperopic error in group A.

Conclusions:

The postoperative hyperopic refractive error should be considered when performing cataract surgery using minus diopter IOL in high myopic patients. The axial length, ACD and corneal keratometry are also factors that cause postoperative refractive errors. Therefore, this should be considered in case of calculating minus diopter IOL with SRK/T formula.

Financial Disclosure:

None