The effect of spatial frequency on steady-state accommodation

Ophthalmic Physiol Opt. 1987;7(3):211-7.

Abstract

Accommodation responses to sinusoidally modulated vertical gratings, at a vergence of -5.0 D, were measured over a 10 min period. Three spatial frequencies were employed: 1.67, 5.0 and 15 cycles degree-1. The results show that 1.67 and 5.0 cycles degree-1 elicit good accommodation responses which are temporally stable. All five subjects employed were unable to maintain an accurate accommodation response to a 15 cycles degree-1 grating. Consideration of the changes occurring in the retinal modulation with accommodative error indicates that spatial frequencies around 5.0 cycles degree-1 are the most useful for accommodation.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Accommodation, Ocular*
  • Adult
  • Female
  • Form Perception / physiology*
  • Humans
  • Male
  • Pattern Recognition, Visual / physiology*
  • Pupil
  • Sensory Thresholds / physiology
  • Time Factors