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Visual thresholds measured with red test object on backgrounds of high and low luminance
Author(s) -
Elenius Valter,
Lein Markku
Publication year - 1987
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.1987.tb07063.x
Subject(s) - luminance , monochromatic color , visual field , color perception test , optics , physics , adaptation (eye) , ophthalmology , color vision , optometry , audiology , medicine
Abstract Visual thresholds measured at the central and midperipheral visual field have been tested in the eyes of a series of 10 healthy normal persons using a monochromatic red test light object (Goldmann area III, 25' of arc in the visual field) of 632 nm wavelength presented on white backgrounds of 150 cd/m 2 (5000 K) and 1 cd/m 2 (2800 K) luminance, as well as with no background illumination following a 45 min period of dark‐adaptation. Another series of 10 normal subjects were tested with an equally large white (2800 K) test object shown on a white background of 1 cd/m 2 (2800 K) luminance. Results obtained in congenital and acquired achromatopsia as well as in three relatively mild cases of rod‐cone dystrophy have been related to the normal thresholds.