Effect of correction of ocular aberration dynamics on the accommodation response to a sinusoidally moving stimulus.
We used an adaptive optics system to correct the aberration dynamics of five subjects while they fixated on a monochromatic stimulus undergoing sinusoidal vergence changes between 1.5 and 2.5 D, at a temporal frequency of 0.2 Hz. The aberrations were measured at 20 Hz using a Shack-Hartmann sensor and corrected using a 37-actuator deformable mirror. The accommodation response (AR) was analyzed in terms of the gain and phase lag. Manipulation of aberrations significantly affected the gain of the AR for only one subject when the odd-order aberrations were corrected. The predictability of the sinusoidal stimulus could account for the lack of an effect in the remaining subjects and conditions.
Chin
Sem Sem
SS
Bradford School of Optometry and Vision Science, University of Bradford, Bradford, West Yorkshire BD7 1DP, UK. S.S.chin@Bradford.ac.uk
Hampson
Karen M
KM
Mallen
Edward A H
EA
D000065:Accommodation, Ocular / Q000502:physiology*; D000328:Adult; D005128:Eye Diseases / Q000503:physiopathology*; D005403:Fixation, Ocular; D006801:Humans; D009038:Motion; D055096:Optical Devices; D010775:Photic Stimulation; D055815:Young Adult