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Spatial summation in young and elderly observers
Author(s) -
Brown Brian,
Peterken Carolyn,
Bowman Kenneth J.,
Crassini Boris
Publication year - 1989
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1111/j.1475-1313.1989.tb00913.x
Subject(s) - scotopic vision , photopic vision , luminance , summation , optics , audiology , optometry , psychology , physics , retina , medicine , neuroscience , stimulation
We measured detection thresholds for targets over a range of sizes at both photopic and scotopic luminance levels in young and elderly observers, and used these data to estimate spatial summation areas 10 degrees in the retinal periphery. There were differences in detection thresholds between the young and old groups at photopic and scotopic luminances, but no differences in spatial summation areas at either background luminance level.