Abstract

The decrease in perceived brightness of a foveal test object produced by a peripheral glare source can be accounted for in terms of a veiling luminance produced by stray light falling on the fovea. The same effect can be produced by an artificial patch of veiling luminance superimposed on the test object. The effect of increasing the angle between the glare source and the test object is equivalent to reducing the brightness of the glare source in accordance with the stray light hypothesis. The measured amount of veiling luminance conforms to that found by previous investigators. The changes in brightness that occur immediately following the onset of a peripheral glare source as well as the changes which occur following removal of the glare source can all be accounted for in terms of the veiling luminance produced by stray light falling on the fovea.

© 1953 Optical Society of America

The Effect on Foveal Vision Produced by a Spot of Light on the Sclera Near the Margin of the Retina

Glenn A. Fry and Mathew Alpern
J. Opt. Soc. Am. 43(3) 187-188 (1953)

Time course of brightness under transient glare condition

Luis A. Issolio, José F. Barraza, and Elisa M. Colombo
J. Opt. Soc. Am. A 23(2) 233-238 (2006)

Effect of Contrast on CFF and Apparent Brightness*

Harris Ripps, Ira T. Kaplan, and Irwin M. Siegel
J. Opt. Soc. Am. 51(8) 870-873 (1961)

Veiling luminance as a descriptor of brightness reduction caused by transient glare

Luis A. Issolio, Pablo A. Barrionuevo, Silvia A. Comastri, and Elisa M. Colombo
J. Opt. Soc. Am. A 29(10) 2230-2236 (2012)

Sources of Entoptic Scatter in the Human Eye*

Robert M. Boynton and Frank J. J. Clarke
J. Opt. Soc. Am. 54(1) 110-119 (1964)