Citation

Vishwanath D. Iperception 2016; 7(2): e2041669516643236.

Affiliation

School of Psychology & Neuroscience, University of St. Andrews, Fife, Scotland, UK.

Copyright

(Copyright © 2016, SAGE Publishing)

DOI

10.1177/2041669516643236

PMID

27433326

PMCID

PMC4934676

Abstract

Viewing a real three-dimensional scene or a stereoscopic image with both eyes generates a vivid phenomenal impression of depth known as stereopsis. Numerous reports have highlighted the fact that an impression of stereopsis can be induced in the absence of binocular disparity. A method claimed by Ames (1925) involved altering accommodative (focus) distance while monocularly viewing a picture. This claim was tested on naïve observers using a method inspired by the observations of Gogel and Ogle on the equidistance tendency. Consistent with Ames's claim, most observers reported that the focus manipulation induced an impression of stereopsis comparable to that obtained by monocular-aperture viewing.

Language: en