A novel contact-lens system to assess visual hemispheric asymmetries.
A soft contact-lens system for achieving unilateral visual stimulation in a free vision format is described. Initial testing with light transmittance and visual perimetry indicated that the lenses created artificial visual-field deficits. The efficacy of the lenses as a technique for lateralizing visual input was evaluated by examining within-subject differences in performance on two visuospatial tasks. Speed and accuracy of performance were greater with visual input directed to the right hemisphere. These data support the lens design as a useful alternative to tachistoscopic procedures and previous lens systems.
Fouty
H E
HE
University of New Mexico.
Otto
M W
MW
Yeo
R A
RA
Briggs
C R
CR
D000328:Adult; D003263:Contact Lenses, Hydrophilic; D004193:Discrimination Learning; D004292:Dominance, Cerebral; D006801:Humans; D008297:Male; D009949:Orientation; D010364:Pattern Recognition, Visual; D011597:Psychomotor Performance; D011930:Reaction Time; D015349:Vision, Monocular