Posters

Toric intraocular lens calculations using anterior segment optical coherence tomography

Poster Details

First Author: Y.Hasegawa JAPAN

Co Author(s):    T. Hiraoka   M. Seki   N. Shinichiro   T. Oshika           

Abstract Details

Purpose:

To evaluate the effect of different types of corneal astigmatism calculated using anterior segment optical coherence tomography on toric intraocular lens (T-IOL) selection and simulated postoperative astigmatism.

Setting:

University-based eye institute

Methods:

This study included 83 eyes of 58 patients undergoing cataract surgery with T-IOL implantation. Three types of corneal astigmatism were calculated using anterior segment optical coherence tomography; Real Power, regular astigmatism of Real Power using Fourier analysis, and regular astigmatism of keratometric astigmatism. Simulated residual astigmatism was calculated based on the power and axis of postoperative T-IOL implanted, actual residual astigmatism, and simulated T-IOL implanted. We calculated simulated T-IOL implanted power and axis by three methods: (1) Real Power, (2) Regular astigmatism of Real Power, (3) Regular astigmatism of keratometric power. We compared simulated residual astigmatism calculated by three methods.

Results:

There were the same T-IOL selection with Real Power in 80 eyes (94.1%) with Regular astigmatism of Real Power, and in 60 eyes (72.3%) with Regular astigmatism of keratometric power. Simulated residual astigmatism based on Real Power, Regular astigmatism of Real Power and Regular astigmatism of keratometric power was 0.63 ± 0.62 D, 0.63 ± 0.62 D and 0.68 ± 0.60 D, respectively, and there was no significant difference among three groups.

Conclusions:

We compared simulated T-IOL selection and residual astigmatism calculated by three corneal astigmatism types measured with anterior segment optical coherence tomography. There were some cases changing T-IOL model, however, there was no significant difference in simulated residual astigmatism among corneal astigmatism types.

Financial Disclosure:

None