Posters

Photic phenomena in eyes implanted with a low-add refractive segmental asymmetric multifocal intraocular lens

Poster Details

First Author: S.Nakano JAPAN

Co Author(s):    R. Fukuda   T. Hiraoka   T. Oshika              

Abstract Details

Purpose:

To investigate the factors which are associated with photic phenomena perception in eyes implanted with a low-add refractive segmental asymmetric multifocal intraocular lens.

Setting:

Ryugasaki Saiseikai Hospital, Ibaraki, Japan

Methods:

Forty-three eyes of 24 patients after cataract surgery with Lentis® Comfort (Santen, Japan) implantation were included. At the 3-month postoperative visit, Subjective refraction, objective refraction, and uncorrected distance visual acuity (UDVA) were assessed and asked whether or not they perceived any disturbing photic phenomena. Pupil diameter was also measured by anterior segment optical coherence tomography (CASIA, TOMEY, Japan). In addition, simulated retinal images based on point spread function (PSF) was obtained with iTrace aberrometer (HOYA, Japan) to confirm whether the perceived photic phenomena could be replicated. Moreover, the obtained data were compared between eyes with and without photic phenomena.

Results:

Seventeen eyes of 10 patients perceived photic phenomena, of which 9 eyes had halo, 2 eyes with decoupling and 6 eyes with fan-shaped asymmetric glare radiation that spread upwards (3 eyes), downwards (2 eyes), and both up and down (1 eye). There was a significant difference in age (p = 0.02, Mann-Whitney U test) between eyes with and without photic phenomena. No significant differences were found in postoperative subjective refraction (p = 0.59), and objective refraction (p = 0.59), UDVA (p = 0.76) photopic pupil diameter (p = 0.12), and mesopic pupil diameter (p = 0.07) between eyes with and without photic phenomena. Although there was no statistical significance, eyes with photic phenomena had relatively larger pupil diameter, especially under mesopic conditions (4.27 ± 0.77 mm), compared to eyes without photic phenomena (3.82 ± 0.56 mm). In eyes with fan-shaped asymmetric glare, the simulated retinal images obtained by iTrace showed asymmetric blur resembling the symptom perceived.

Conclusions:

There is a possibility that patients implanted with Lentis® Comfort perceive photic phenomena, which are dependent of age and independent of refractive error, UDVA, and pupil diameter in this study. However, further investigations are needed to elucidate the exact incidence and the related factors in large-population studies.

Financial Disclosure:

None