근시안에서 엑시머레이저 굴절교정각막절제술의 효과 = Effect of Excimer Laser Photorefractive Keratectomy for Correction of Myopia

다국어 초록 (Multilingual Abstract)

The excimer laser allows the controlled ablation of corneal tissue to correct refractive error. we analyzed clinical results of excimer laser photorefractive keratectomy on 70 eyes followed up more than 6 months from May 1994 to December 1996. The patients were divided into 3 groups according to their myopic degree ; group I : -2.0 ~ -3.75D, Ⅱ : -4.0~ -5.75D, Ⅲ : -6.0D ~ -9.0D We evaluated the amount of myopic correction, visual acuity, corneal opacity and complications.
At 6 months after operation, uncorrected visual acuity over 0.8 was achieved in 93.7% in group I, 89.6% and 84% in group Ⅱ,Ⅲ. Achieved correction within ±1.0D at six months were 100%, 79.3% and 72% in each group. Mean manifest refraction(spherical equivalent) of each group were -0.34DM -0.4D and -0.85D at six months. Corneal haze was detected at 2 weeks after operation and disappeared at 3 months in almost cases. There was no significant change of intraocular pressure except two cases and delayed epithelial wound healing was noted in only one case. Blurred vision at night was common complain.
Photorefractive keratectomy with 193 nm excimer laser appears to be very effective method for reducing low to moderate and range of -6.0D ~ -9.0D of myopia.