Optical performance of multi-zonal design multifocal intraocular lens

Session Details

Session Title: Presented Poster Session: Enlarged Depth of Focus vs Multifocal IOLs

Venue: Poster Village: Pod 1

First Author: : Y.Eom SOUTH KOREA

Co Author(s): :    S. Choi   C. Kim   S. Yang   J. Choi   J. Kim   H. Kim        

Abstract Details

Purpose:

To evaluate astigmatism induced by a multi-zonal design multifocal intraocular lens (IOL), the Precizon CTF IOL, and its’ optical performance.

Setting:

Korea University College of Medicine, Seoul, South Korea Space Optics Laboratory, Department of Astronomy, Yonsei University, Seoul, South Korea Joeunnun Vision Clinic, Seoul, South Korea Central Seoul eye center, Seoul, South Korea

Methods:

The clinical study enrolled 68 eyes of 34 consecutive cataract patients implanted with the Precizon CTF IOL. IOL-induced astigmatism measured by autorefraction and subjective refraction were investigated using vector analysis according to the orientation of the 1st near add power of the implanted IOL. In the experimental simulation study, ray-tracing was used to construct pseudophakic eye models with the Precizon CTF IOL. Simulated retinal images were investigated according to the orientation of IOL in eyes with 0.5 diopter (D) with-the-rule (WTR) corneal astigmatism.

Results:

The mean IOL-induced astigmatism measured by autorefraction was 1.06 ± 0.66 D at 3 degrees in the horizontal orientation and was 1.65 ± 0.73 D at 95 degrees in the vertical orientation. However, the mean IOL-induced astigmatism measured by subjective refraction was 0.61 ± 0.47 D at 180 degrees and 0.87 ± 0.42 D at 93 degrees, respectively. The ray-tracing simulation study in eyes with 0.5 D WTR corneal astigmatism showed that the horizontal orientation provides a clearer image than the vertical orientation at a distance of 50 Cm, but the opposite result was obtained at 40 Cm distance.

Conclusions:

The vertical orientation of 1st near add power of the Precizon CTF IOL Implantation induced WTR astigmatism and the horizontal orientation induced against-the-rule (ATR) astigmatism. The horizontal orientation could reduce the amount of refractive astigmatism in eyes with WTR corneal astigmatism resulting in a clear near vision at 50 Cm distance. On the other hand, the vertical orientation in eyes with WTR corneal astigmatism seems to increase the depth of field.

Financial Disclosure:

None