Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Understanding disability glare: light scatter and retinal illuminance as predictors of sensitivity to contrast

Not Accessible

Your library or personal account may give you access

Abstract

The presence of a bright light in the visual field has two main effects on the retinal image: reduced contrast and increased retinal illuminance because of scattered light; the latter can, under some conditions, lead to an improvement in retinal sensitivity. The combined effect remains poorly understood, particularly at low light levels. A psychophysical flicker-cancellation test was used to measure the amount and angular distribution of scattered light in the eye for 40 observers. Contrast thresholds were measured using a functional contrast sensitivity test. Pupil-plane glare-source illuminances (i.e., 0, 1.35, and 19.21lm/m2), eccentricities (5°, 10°, and 15°), and background luminances (1, 2.6, and 26cd/m2) were investigated. Visual performance was better than predicted, based on a loss of retinal image contrast caused by scattered light, particularly in the mesopic range. Prediction accuracy improved significantly when the expected increase in retinal sensitivity in the presence of scattered light was also incorporated in the model.

© 2015 Optical Society of America

Full Article  |  PDF Article
More Like This
Retinal mesopic adaptation model for brightness perception under transient glare

Pablo Alejandro Barrionuevo, Elisa Margarita Colombo, and Luis Alberto Issolio
J. Opt. Soc. Am. A 30(6) 1236-1247 (2013)

Contrast sensitivity and disability glare in the middle years

Joseph M. Harrison, Raymond A. Applegate, J. Terry Yates, and Charles Ballentine
J. Opt. Soc. Am. A 10(8) 1849-1855 (1993)

Disability glare: effects of temporal characteristics of the glare source and of the visual-field location of the test stimulus

Isabel Cristina Bichão, Dean Yager, and Jeanette Meng
J. Opt. Soc. Am. A 12(10) 2252-2258 (1995)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (10)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved