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

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE