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Effect of radial keratotomy on the contrast sensitivity function
1Southern California College of Optometry, Fullerton.
American Journal of Optometry and Physiological Optics
|October 1, 1988
Summary
Radial keratotomy (RK) surgery significantly reduced contrast sensitivity in the operated eye compared to the unoperated eye. Some patients experienced notable vision changes due to glare and altered eye optics post-surgery.
Area of Science:
- Ophthalmology
- Vision Science
Background:
- Radial keratotomy (RK) is a refractive surgical procedure.
- The Prospective Evaluation of Radial Keratotomy (PERK) study investigated RK outcomes.
Purpose of the Study:
- To assess the impact of RK on contrast sensitivity.
- To compare contrast sensitivity between operated and unoperated eyes post-RK.
Main Methods:
- Contrast sensitivity function (CSF) was measured in six patients undergoing unilateral RK.
- Measurements were taken under maximum correction and no over-correction conditions.
Main Results:
- A significant postsurgical reduction in CSF was observed in the operated eyes of all patients.
- Three out of six patients showed significant CSF differences between their operated and unoperated eyes.
Conclusions:
- Radial keratotomy can lead to a decrease in contrast sensitivity.
- Changes in glare and spherical aberration may explain the observed reductions in contrast sensitivity after RK.