The Stereoscopic Frame of Reference in Asymmetric Convergence of the Eyes: Response to 'Point' Stimu

Abstract The effect of asymmetric convergence of the eyes on the orientation and shape of the stereoscopic frame of reference was investigated. The results were contrasted with those obtained with the eyes in symmetrical convergence when the corresponding size differences were introduced by afocal magnifying lenses. The stimulus configuration was designed to contain as few as possible vertically separated contours in order to reduce the influence of the induced size effect on the orientation of the stereoscopic frame of reference. The results indicated significant variation, both in orientation and in curvature, of the reference curve from theoretically expected values. They have also indicated that the induced size effect accounted for less than half of the observed change in orientation of the curve during asymmetric convergence.