A new stereo test using a field-sequential stereoscopic.

Abstract

Using a field-sequential stereoscopic TV system (Sharp X-1 turbo) and a pair of eye glasses with build in liquid crystal shutters, we studied stereopsis from far distance in patients with strabismus and normal subjects. The odd fields of the TV were designed to be. seen by the left eye and the even fields by the right eye through the liquid crystal shutters. The fields were displayed on the TV with 60 Hz. The stereoscopic patterns were drawn with a microcomputer and displayed on the TV screen. Stereopsis was detected in some cases of very young or low intelligent children in whom ordinary stereoscopic tests can not be properly performed. It was found that the stereoscopic TV system was quite useful for examining stereopsis in young patients with strabismus.