Posters

Investigation of factors influencing the photic phenomena, such as halo and glare, in two different types of multifocal IOLs; diffractive trifocal IOL and extended depth of focus IOL

Poster Details

First Author: T.Teshigawara JAPAN

Co Author(s):    A. Meguro   N. Mizuki                 

Abstract Details

Purpose:

To investigate the influence of age, gender, pre- and postoperative refraction and postoperative pupil size on the size and intensity of halo and glare in diffractive trifocal IOL: Acrysof IQ PanOptix (Alcon, USA), and extended depth of focus (EDOF) IOL: TECNIS Symfony (Johnson & Johnson, USA). The change in the size and intensity of halo and glare between one-month post-operatively and three-month post-operatively in each IOL was investigated. Correlation between all variables was also analyzed.

Setting:

Yokohama Tsurumi Chuoh Eye Clinic and Yokosuka Chuoh Eye Clinic, Kanagawa, Japan

Methods:

Randomized prospective study of 160 patients: 80 patients with PanOptix, 80 patients with Symfony. The size and intensity of halo and glare were examined binocularly using computer-based simulator (Halo and Glare Simulator, Eyeland Design Network GmbH, Germany) one month and three month post-operatively. The changes in each photic phenomenon between one-month and three-month in both IOLs were checked. Pre- and post-operative refraction were examined. Post-operative pupil size was examined by CASIA2 (Tomey, Japan). The correlation of the size and intensity of halo and glare with age, gender, pre- and post-operative refraction, and post-operative pupil size were also investigated.

Results:

One and three months post-operatively, size of halo was significantly higher in PanOptix than Symfony (P<0.05), and intensity of halo, and size and intensity of glare were significantly higher in Symfony than PanOptix (P<0.05). In both IOLs, all photic phenomena significantly decreased between one and three months post-operatively (P<0.005). In both IOLs, post-operative pupil size showed significant positive correlation, and age and pre- and post-operative refraction demonstrated significant negative correlation with photic phenomena (P<0.001). Men were significantly more sensitive to photic phenomena in each IOL (P<0.05). Age and pre-operative refraction showed significant negative correlation with post-operative pupil size (P<0.05).

Conclusions:

Different multifocal IOLs showed different degrees of photic phenomena. The photic phenomena mitigated over time. Pre- and post-operative refraction, post-operative pupil size, and age were influential in the degree of photic phenomena, and these factors were mutually influential. Some factors showed different degree of correlation with photic phenomena depending on types of IOLs. Men may be more sensitive to the photic phenomena. The younger age, stronger myopia, larger pupil and men can be possible factors causing vulnerability to higher degree of photic phenomena. Conversance to the relationships may help to develop new design of multifocal IOLs with less photic phenomena.

Financial Disclosure:

None