We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Changes in Contrast Sensitivity Function and Ocular Higher Order Aberration by Conventional Myopic Photorefractive Keratectomy.
- Authors
Norishige Sakata; Tadatoshi Tokunaga; Kazunori Miyata; Tetsuro Oshika
- Abstract
Abstract Purpose To evaluate the relation between induced changes in ocular higher order aberrations and changes in the contrast sensitivity function in patients undergoing excimer laser photorefractive keratectomy (PRK). Methods Myopic PRK using excimer laser was performed in 31 patients (56 eyes). The preoperative refractive error was −6.2 � 2.9 diopters. Before and 1 month after surgery, we measured the ocular higher order aberrations for a 4-mm pupil, and three indices of contrast sensitivity function. From the data collected, the area under the log contrast sensitivity function (AULCSF) was calculated. Results PRK significantly reduced AULCSF (P = 0.004), low-contrast visual acuity (P = 0.004), and letter-contrast sensitivity (P = 0.013). Coma-like (P P r = −0.468, P r = −0.291, P = 0.033) aberrations. The change in low-contrast visual acuity by PRK significantly correlated with the change in coma-like aberration (r = 0.599, P r = 0.136, P = 0.326). There were significant correlations between changes in letter-contrast sensitivity and changes in coma-like (r = −0.450, P r = −0.255, P = 0.048) aberrations. Conclusions PRK significantly increases ocular higher order aberrations, which compromise contrast sensitivity function after surgery. Jpn J Ophthalmol 2007;51:347–352 � Japanese Ophthalmological Society 2007
- Subjects
CONTRAST sensitivity (Vision); OPTICAL aberrations; MYOPIA; EXCIMER lasers; REFRACTIVE errors; OPHTHALMOLOGY
- Publication
Japanese Journal of Ophthalmology, 2007, Vol 51, Issue 5, p347
- ISSN
0021-5155
- Publication type
Article
- DOI
10.1007/s10384-007-0467-9