| Literature DB >> 20835401 |
Lawrence R Stark1, Philip B Kruger, Frances J Rucker, William H Swanson, Nathan Schmidt, Caitlin Hardy, Hadassa Rutman, Theodore Borgovan, Sean Burke, Mustanser Badar, Raj Shah.
Abstract
The purpose of this study is to determine if cues within the blurred retinal image due to the Stiles-Crawford (SC) effect and the eye's monochromatic aberrations can drive accommodation with a small pupil (3 mm) that is typical of bright photopic conditions.The foveal, psychophysical SC function (17 min arc) and ocular monochromatic aberrations were measured in 21 visually normal adults. The retinal image of a 10.2 min arc disc was simulated for spherical defocus levels of -1 D, 0 D and +1 D in each of four conditions consisting of combinations of the presence or absence of the individual SC function and monochromatic aberrations with a 3 mm pupil. Accommodation was recorded in eleven participants as each viewed the simulations through a 0.75-mm pinhole.The SC effect alone did not provide a significant cue to accommodation. Monochromatic aberrations provided a statistically significant but rather small cue to monocular accommodation.Entities:
Year: 2009 PMID： 20835401 PMCID： PMC2934758 DOI： 10.1080/09500340903184295
Source DB: PubMed Journal: J Mod Opt ISSN： 0950-0340 Impact factor: 1.464