Add like
Add dislike
Add to saved papers

Corneal topography six years after photorefractive keratectomy for myopia and myopic astigmatism.

PURPOSE: To analyze the 6-year response of corneal topography to photorefractive keratectomy (PRK) for myopia and myopic astigmatism.

METHODS: Twenty patients (40 eyes) who had PRK using the Technolas Keracor 217C excimer laser platform were followed up to 6 years after surgery. The eyes were subdivided into three groups according to the preoperative spherical equivalent refraction and astigmatism component. Corneal topographic maps were obtained with a Placido disk topographer (Keratron Scout). The pre- and postoperative topographical data were imported into custom software, which computed the average composite corneal map and average difference map for each study group to quantify the anterior corneal changes following laser ablation. The software defined three concentric zones of the surface topography, allowing characterization of the regional corneal response following surgery.

RESULTS: At 6 years, no changes in the surface topographic configuration of the central cornea were assessed following spherical myopic ablations in comparison with 1 year postoperatively. A slight peripheral flattening of approximately 0.60 diopters (D) (P < .001) was measured following the higher myopic ablations at 6 years compared with 1 year postoperatively. Minimal changes, of approximately 0.30 D (P < .001), in the anterior central cornea were observed following astigmatic correction during follow-up.

CONCLUSIONS: Photorefractive keratectomy for the correction of myopia provides stable comeal topography, with no clinically significant changes in the curvature profile at 6 years after surgery.

Full text links

We have located links that may give you full text access.
Can't access the paper?
Try logging in through your university/institutional subscription. For a smoother one-click institutional access experience, please use our mobile app.

For the best experience, use the Read mobile app

Mobile app image

Get seemless 1-tap access through your institution/university

For the best experience, use the Read mobile app

All material on this website is protected by copyright, Copyright © 1994-2024 by WebMD LLC.
This website also contains material copyrighted by 3rd parties.

By using this service, you agree to our terms of use and privacy policy.

Your Privacy Choices Toggle icon

You can now claim free CME credits for this literature searchClaim now

Get seemless 1-tap access through your institution/university

For the best experience, use the Read mobile app