Spatial summation in young and elderly observers.
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.
Brown
B
B
Department of Optometry, Queensland University of Technology, Brisbane, Australia.
Peterken
C
C
Bowman
K J
KJ
Crassini
B
B
D000328:Adult; D000368:Aged; D000375:Aging / Q000502:physiology*; D006801:Humans; D008875:Middle Aged; D012684:Sensory Thresholds; D013028:Space Perception / Q000502:physiology*; D014787:Vision Tests