Effect of pterygium surgery on refractive spherocylinder power and corneal topography.
OBJECTIVE
To evaluate the effect of pterygium surgery on refractive spherocylinder power and corneal topography.


METHODS
Twenty-four patients (27 eyes) undergoing pterygium surgery from January to December 2006 were retrospectively identified. Visual acuity, refractive spherocylinder power, and corneal topography were measured preoperatively and postoperatively.


RESULTS
Improvement of visual acuity, decreases of refractive spherocylinder power, and significant differences of 3-mm topographic irregularity and 3-mm topographic astigmatism postoperatively were found. Differences of refractive spherocylinder power preoperatively and postoperatively correlated significantly with differences of 3-mm topographic irregularity (spherical, r = 0.828, P = .000; cylinder, r = -0.805, P= .000) and of 3-mm topographic astigmatism (spherical, r = 0.673, P= .000; cylinder, r = -0.811, P = .000) preoperatively and postoperatively.


CONCLUSIONS
Pterygium surgery produces improvements in visual acuity, decreases of refractive spherocylinder power, topographic irregularity, and topographic astigmatism. Three-millimeter topographic irregularity and astigmatism have a close correlation with refractive spherocylinder power.
Wu
Pei-Lun
PL
Department of Ophthalmology, Chang Gung Memorial Hospital, Chiayi, Taiwan.
Kuo
Chien-Neng
CN
Hsu
Han-Lin
HL
Lai
Chien-Hsiung
CH
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003315:Cornea / Q000503:physiopathology*; D019781:Corneal Topography; D006801:Humans; D008875:Middle Aged; D013508:Ophthalmologic Surgical Procedures; D011625:Pterygium / Q000503:physiopathology / Q000601:surgery*; D012029:Refraction, Ocular / Q000502:physiology; D012030:Refractive Errors / Q000503:physiopathology*; D012189:Retrospective Studies; D014792:Visual Acuity / Q000502:physiology