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VERGENCE EYE‐MOVEMENT RESPONSES TO WHOLE‐BODY LINEAR ACCELERATION STIMULI IN MAN *
Author(s) -
Smith Russell
Publication year - 1985
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1111/j.1475-1313.1985.tb00671.x
Subject(s) - eye movement , supine position , fixation (population genetics) , vergence (optics) , optics , electrooculography , physics , audiology , optometry , communication , mathematics , psychology , ophthalmology , medicine , surgery , population , environmental health
— Eight human subjects were exposed to periodic linear acceleration stimuli of ±1.0 ms ‐2 at 0.2 Hz and ±2.5 ms ‐2 at 0.3, 0.45 and 0.67 Hz, whilst lying in the supine position on a large‐stroke vertical vibration platform. Eye movements were recorded by an infrared corneal reflection technique. In conditions of total darkness, with no visual stimulation, all subjects exhibited eye‐movement responses composed of both conjugate and vergence components. Subsequent computer analysis of the vergence eye‐movement responses showed that they were periodic and related to subject displacement. In a second experimental condition, a platen‐fixed LED matrix fixation target was illuminated 0.91 m vertically above the subject. It was found that fixation upon this target did not abolish the vergence eye‐movement response, although it was suppressed by ˜50%.