An examination of visual acuity and depth perception as a function of magnification

Abstract

The effectiveness of magnification, (comparing binoculars of three powers, 6 X, 7 X, 10 X, with unaided vision) as an aid to ordnance optics was studied under desert conditions. Visual acuity was studied with a modified Landolt ring display, depth perception with method of constant stimuli in which a movable target had to be aligned with a stationary target. Visual acuity at a range of 100 yards was significantly better with binoculars than with the unaided eye, but there was no significant difference among the binoculars. For depth perception, sensitivity was independent of magnification and nearly independent of range. (PsycInfo Database Record (c) 2025 APA, all rights reserved)