Accession Number:
AD0619643
Title:
BIONOCULAR SUMMATION AT THE ABSOLUTE THRESHOLD OF PERIPHERAL VISION,
Descriptive Note:
Corporate Author:
COLUMBIA UNIV NEW YORK
Personal Author(s):
Report Date:
1962-04-13
Pagination or Media Count:
12.0
Abstract:
Binocular probability of seeing, PB, was measured as a function of the time between onsets of 2-msec, 35-min visual angle flashes to corresponding locations 7 degrees horizontally displaced from the foveas of both eyes of dark adapted subjects. PB was greater than the value that would be predicted if the two eyes were independent detectors P prime B for interstimulus intervals below 100 msec. Two peak values of PB were observed, one occurring close to zero and the other close to 90 msec. PB and P prime B were indistinguishable for interstimulus intervals above 100 msec. It is concluded that the largest barrier to seeing at threshold lies in a pathway common to the two eyes. Author