title: Effect of target content at higher spatial frequencies on the accuracy of the accommodation response.
abstract: The accommodation responses to sinusoidal and square-wave gratings at the same vergence (-5.0 dioptres) are compared as a function of the modulation of the fundamental of both waveforms. At low spatial frequencies (less than or equal to 2 c deg-1), responses to square-wave gratings are found to be more accurate than those to sine-waves. At higher frequencies the responses become very similar. An explanation is offered in terms of the contribution of higher harmonics to the square-wave response.
authors: Department of Ophthalmic Optics, University of Manchester Institute of Science and Technology, U.K.
authors: J
authors: J
authors: Tucker
authors: W N
authors: WN
authors: Charman
mesh_terms: D000065:Accommodation, Ocular; D000328:Adult; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D010364:Pattern Recognition, Visual / Q000502:physiology*; D014792:Visual Acuity