미세각막절개도에서 일회용 칼날의 반복 사용이 칼날과 각막 절삭면에 미치는 영향

초록

Purpose: To evaluate changes in the blade, flap dimensions, and stromal bed with repeated use of disposable blade in LASIK (laser in situ keratomileusis) surgery. Methods: A keratome was used to make a corneal flap in pig cadaver eyes, with the blades being reused up to five times. The thickness and diameter of each corneal flap was measured. Scanning electron microscopy of the stromal beds and blade cutting edges was performed to determine the effect that repeated use of the blade had on the stromal bed, and on the cutting edge of the blade. Results: The thickness/diameter of flap was 169.73±7.55 μm/8.60±0.23 mm after single use and 142.93±13.10 μm/8.72±0.20 mm after being used five times, with both demensions decreasing as the blade was used more. The edge of the blade became blunt and irregular and the cutting surface rough and irregular with continual use. Conclusions: During LASIK surgery, reused blades became blunt, causing a thin flap, rough cutting face, and complications such as irregular astigmatism clinically.

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