Effect to visual function by sub-surface nano glistening and glistening

Session Details

Session Title: Cataract Surgery Complications/Management

Session Date/Time: Monday 12/09/2016 | 16:30-18:15

Paper Time: 17:56

Venue: Auditorium C6

First Author: : H.Matsushima JAPAN

Co Author(s): :    K. Ohnuma   M. Aose   M. Nagata   K. Mukai   T. Senoo        

Abstract Details

Purpose:

Sub-surface nano glistening (SSNG) and glistening are often recognized in hydrophobic acrylic intraocular lenses (IOLs) after implantation. Previous study shows that the changes of light transmittance are small; however the effects of light scattering to visual functions are concerned. In this study, we try to produce the actual patients’ view using a model eye and extracted IOLs.

Setting:

Department of Ophthalmology, Dokkyo Medical University, Tochigi, Japan.

Methods:

Five MA60BM (Alcon) were extracted because of IOL dislocation or loss of visual functions. The IOLs were 6 to 15 years over times after implantation and had significant SSNG and/or glistening. Light transmittance was measured using U-4100 (HITACHI). The extracted IOLs were placed into a model eye with a digital camera for reproduce a patients’ view with the IOLs. To quantify the degrees of light scattering with SSNG and/or glistening, the extracted IOLs were placed into a cell, and scattered lights were measured using a luminance meter（BM-9A, TOPCON）after changing the angle between the luminance meter and IOLs.

Results:

The light transmittance with the extracted IOLs is 79.1-86.8% during the control IOL (unused MA60BM) is 88.9%. The simulated eye reproduces glare and halo with car lights, street lights and signals during nights using the SSNG and/or glistening IOLs. Luminance meter shows the loss of light scattering when the increasing of angles with incoming light using the control IOL. However, the intensity of light scattering didn’t decrease from 40 to 50 degrees incoming light using the SSNG and/or glistening IOLs.

Conclusions:

The SSNG and/or glistening cause small decrease of light transmittance but typical glare halo during night. The light scattering by the angled incoming light to SSNG and/or glistening IOLs may cause the glare and halo.

Financial Disclosure:

NONE