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목적 : To analyze corneal curvature changes (e.g., central corneal power and corneal astigmatism) after upper eyelid surgery, and to compare the effects of different upper eyelid procedures on corneal curvature.
방법 : Fifty eyes of 34 patients with various degrees of dermatochalasis or ptosis underwent corneal topography before surgery, and at 6 weeks after blepharoplasty or levator resection. Patients were divided into groups according to the method of surgery. Preoperative and postoperative changes in corneal curvature of each operated eye were compared within each group.
결과 : At 6 weeks after levator resection, 50% of the eyes increased in corneal power and 15.4% showed no change. The corneal astigmatism in 50% of eyes decreased and showed no change in 30.8% of eyes. At 6 weeks after blepharoplasty, 12.5% of the eyes increased in corneal power and 66.7% showed no change. Regarding the corneal astigmatism, 16.7% of the eyes decreased and 66.6% showed no change. Comparing eyes treated with the two surgical methods, there was statistically difference in percentage of eyes with corneal values change using these techniques (P<0.05).
결론 : Repositioning of the upper eyelid after levator resection showed greater changes of corneal curvature (e.g., central corneal power and corneal astigmatism) than blepharoplasty. The advanced aponeurosis technique may have a greater effect on the lid/cornea interface, by pressing against the eyeball to affect corneal curvature
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