Publication
Title
Orientation changes of the main corneal axes as a function of age
Author
Abstract
Purpose. The purpose of this study was to assess the orientation of the anterior and posterior corneal surfaces with respect to the keratometric axis in the three-dimensional space. Methods. A group of 407 normal corneas of 211 subjects with ages ranging from 4 to 79 years was analyzed by fitting their elevation topographies to a general three-axes ellipsoid model. Results. The resulting average tilt (-1.20 degrees) and tip (1.83 degrees) of the anterior surface are consistent with previous findings. In addition, we found that the posterior surface is also misaligned with the anterior by a similar amount. The cornea seems to rotate as a solid body by 2 minutes of arc per year. Conclusions. The misalignment between the cornea and the keratometric axis increases as a function of age. This tiny, but significant (p < 0.005), rotation may have an important impact on optical quality because it could cause an important increase of the higher order aberrations of the cornea with age. (Optom Vis Sci 2013;90:23-30)
Language
English
Source (journal)
Optometry and vision science. - Baltimore, Md
Publication
Baltimore, Md : 2013
ISSN
1040-5488
Volume/pages
90:1(2013), p. 23-30
ISI
000313015200013
Full text (Publisher's DOI)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 28.02.2013
Last edited 11.06.2017
To cite this reference