Adaptation to the prismatic effects of refractive lenses.
Adaptation to the simple visual displacement of prisms was compared to that for refractive lenses, which have a varied prismatic effect. Subjects were made myopic using contact lenses, then corrected using spectacle lenses. The effect on the perceived direction of a randomly located target was assessed from pointing behavior. Prism adaptation showed a negative directional aftereffect but lacked intermanual transfer. Lens adaptation lacked a negative aftereffect but exhibited intermanual transfer. The results suggest that lens adaptation involves a recalibration of extraretinal eye movement information and multiple sets of lens adaptation can be retained for short periods.
Tuan
K M
KM
University of California, School of Optometry, Berkeley, USA.
Jones
R
R
D000221:Adaptation, Ocular / Q000502:physiology*; D003261:Contact Lenses; D005139:Eyeglasses; D005403:Fixation, Ocular; D006801:Humans; D007909:Lenses; D009216:Myopia / Q000503:physiopathology; D013028:Space Perception / Q000502:physiology*; D013997:Time Factors