Brightness perception under transient glare conditions with myopic observers wearing contact lenses and spectacles

Luis Issolio; Norberto Lopez-Gil; Elisa M. Colombo; Ignacio Miro

doi:10.1117/12.437139

14 August 2001 Brightness perception under transient glare conditions with myopic observers wearing contact lenses and spectacles

Luis Issolio, Norberto Lopez-Gil, Elisa M. Colombo, Ignacio Miro

Author Affiliations +

Proceedings Volume 4419, 4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications; (2001) https://doi.org/10.1117/12.437139
Event: IV Iberoamerican Meeting of Optics and the VII Latin American Meeting of Optics, Lasers and Their Applications, 2001, Tandil, Argentina

Abstract

Transient glare reduces the perceived brightness for stimulus luminances within the scotopic-mesopic range. This work studies this effect in myopic observers with lens and spectacles corrections and in one emmetrope. The task of the subject consists of compare brightness of two uniform luminance fields sequentially displayed, one of which had a reference luminance of 1 cd/m². The reference stimulus was presented under glare condition the angle between the glare source and the lie of sight was 10 degrees. The reference field and he glare source were onset at the same time. Subjects had to report which field was brighter with respect to one another. A YES-NO method with constant stimulus was adopted to determine the perceptual matching luminance. Then duration of each stimulus was 300 msec and the interval between both of them was 1.2 msec. We found the effect of the transient glare is stronger as myopic subjects wear glasses corrections than they wear contact lens and the effect is even less for emmetropic subject with the naked eyes. Results could be explained considering an additional ectoptic light veil due to scattering on the glasses and lens.

Citation Download Citation

Luis Issolio, Norberto Lopez-Gil, Elisa M. Colombo, and Ignacio Miro "Brightness perception under transient glare conditions with myopic observers wearing contact lenses and spectacles", Proc. SPIE 4419, 4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications, (14 August 2001); https://doi.org/10.1117/12.437139

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