Stereopsis with normal and reversed binocular parallax using a head mounted display in normal and strabismic subjects

Article Abstract:

A virtual reality system composed of a head mounted display and controls was used to determine how people perceive the three-dimensional world. Four subjects with normal vision and four strabismic patients viewed some familiar objects and an unfamiliar object under normal parallax, reversed parallax and monocular conditions. Familiar objects were recognized under each condition but there was confusion among normal subjects for unfamiliar objects. Strabismic patients exhibited change under each condition. Results indicate that strabismic patients use monocular stereoptic keys more than normal people to compensate for their lack of binocular parallax perception.

Strabismus

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The binocular fusion of human vision on stereoscopic displays - field of view and environment effects

Article Abstract:

Fusional limits of binocular stereoscopic vision determine the reproduction range of stereoscopic images as well as the conformity between the stereoscopic display and stereoscopic vision. Results of experiments aimed at examining the possible effects on fusional limits of the field of view and viewing distance revealed that fusional limits increase in proportion to the field of view angle and are affected by the size of the viewing target and the effects of the environment on the target. These are the factors behind the differences between binocular vision in real space and in stereoscopic display.

Securities and Commodity Exchanges, Security and commodity exchanges, Commodity Exchanges, Visual fields

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Influence on visual function by a stereoscopic TV programme with binocular liquid crystal shutter and Hi-Vision TV display

Article Abstract:

No significant difference in visual functions were found after viewership of a field sequential stereoscopic Hi-Vision TV program with a binocular liquid crystal shutter. An investigation of the influence on visual functions by the TV program was conducted on 24 subjects, whose ocular alignment, fusional amplitude, AC/A ratio, stereoacuity, accommodation and pupil size were measured before and after the visual load. It was concluded that this type of three-dimensional display may not pose hazards to visual functions. Results may be different for aged or visually handicapped people, though.

Stereoscopic television

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