A comparison of self-reported and measured autostereogram skills with clinical indicators of vergence and accommodative function.

Failure to perceive the disparity-defined form in autostereograms by those with clinically normal stereoacuity can occur when achieving or maintaining the precise vergence angle required to place the intended left and right images on corresponding areas of the two retinas is difficult. Since vergence and accommodation must be maintained at different depth planes to permit sensory fusion of an autostereogram, poor autostereogram skill has been suggested by different investigators to be related either to the presence of a binocular vision anomaly (ie a poorly tuned binocular system) or to a binocular system that is well-coordinated. The purpose of this study was to clarify the relationship between binocular visual performance and autostereogram skill.