Chonnam Med J.  2005 Dec;41(3):276-279.

The Change of Corneal Refractive Power Measured by Corneal Topography before and after Pterygium Surgery

• Yoon KC
• Jeong TS
• Wu MH
• Park YG
• Nah HJ

Abstract

To evaluate the postoperative changes of corneal refractive power in central area and paracentral area using corneal topography after pterygium surgery. Baseline corneal topography was performed on 17 consecutive eyes of 17 patients who underwent pterygium surgery after surgical removal of pterygium, corneal topography was repeated at 6 months postoperatively. We examined the changes of the corneal refractive power on the 8 points that were apart from corneal apex by 1.5 mm, 3.5 mm along each axis corresponding to the 0 degree, 90 degrees, 180 degrees, 270 degrees, respectively. The changes of refractive power of points apart from corneal apex by 1.5 mm were not statistically significant along each axis corresponding to the 0 degree, 90 degrees, 180 degrees, 270 degrees, respectively. Apart from corneal apex by 3.5 mm, significant corneal refractive changes occured at 0 degree was -3.07 +/-2.58 D (p=0.04). but, the other points were not significant. Pterygium induced corneal astigmatism seems to be resulted from the changes of corneal refractive power of the paracentral area rather than central area.

Keyword

Astigmatism; Pterygium; Corneal topography

MeSH Terms

Astigmatism
Axis, Cervical Vertebra
Corneal Topography*
Humans
Pterygium*