London 2014 Registration Visa Letters Programme Satellite Meetings Glaucoma Day 2014 Exhibition Hotel Booking Virtual Exhibition Star Alliance
london escrs

Course handouts are now available
Click here

Come to London


WATCH to find out why

Site updates:

Programme Updates. Programme Overview and - Video Symposium on Challenging Cases now available.

Attenuating glare disability and photostress through the addition of a blue-light filter

Search Abstracts by author or title
(results will display both Free Papers & Poster)

Session Details

Session Title: IOL technology/New IOLs etc.

Session Date/Time: Saturday 13/09/2014 | 08:30-10:30

Paper Time: 09:04

Venue: Boulevard A

First Author: : B.Hammond USA

Co Author(s): :    M. Venkiteshwar              

Abstract Details


To evaluate the effects of filtering short wavelength light on visual performance under intense light conditions among pseudophakes previously implanted with a clear intraocular lens (IOL).


This prospective, subject-masked study was conducted across 6 US sites.


155 pseudophakes previously implanted with an IOL largely transparent to visible light were recruited. Photostress recovery time (PRT) and disability glare thresholds were measured on all subjects with a clip-on blue light filter (BLF) and placebo (no blue light filtration) filter. Photostress recovery time was quantified as the time necessary to regain sight after exposure to a 10-deg circular broad-band white at ~4.5 logTrolands. Disability glare threshold was defined as the intensity of a white-light annulus (10-deg diameter) necessary to obscure a central grating target. The order of filter used and test eye was randomized across the subjects.


Photostress recovery time was significantly faster with the addition of the BLF (5.66±6.2 s) compared to placebo filter (6.94±7.16 s, p=.0001). The difference in PRT was 1.37±4.32 seconds with 95% confidence interval from 0.6 to 2.08 seconds. Glare disability threshold was significantly higher with the BLF (1.37±0.88 log unit) compared to placebo filter (1.26±0.92 log unit, p=.0001). The difference in PRT was 0.12±0.38 log unit with 95% confidence interval from 0.06 to 0.18 log unit. Visual acuity and pupil function did not change with the addition of BLF compared to placebo filter.


The study results demonstrate a significant within-eye benefit of blue light filtration in visual performance among pseudophakes previously implanted with IOLs largely transparent to visible light.

Financial Interest:

One or more of the authors... is employed by a forNONEprofit company with an interest in the subject of the presentation

Back to previous