Atchison DA, Lee J, Lu J, et al. - Researchers conducted the study for analyzing the impacts of simulated anisometropia and aniseikonia on stereopsis, the ability to perceive depth in visual space due to the sensory fusion of retinal images from both eyes. Ten candidates with normal binocular vision viewed McGill modified random dot stereograms via synchronised shutter glasses. Using a four-alternative forced-choice procedure, stereoacuities were determined. About, each 1 D of induced anisometropia had the same effect on threshold as did each 6% of induced aniseikonia. Stereopsis was influenced by the axes of meridional anisometropia but not the aniseikonia. This indicates variations in how monocular blur (anisometropia) and interocular shape differences (aniseikonia) are processed during stereopsis production.