Cho Y S, Kim C G, Kim W B, Kim C W
Kim's Eye Center, Pusan, Korea.
Refract Corneal Surg. 1993 Mar-Apr;9(2 Suppl):S37-41.
Nineteen human myopic eyes exceeding -8.00 D underwent multi-step excimer laser photorefractive keratectomy (PRK) with 6-month follow up. We performed two or three step PRK at the same time according to the amount of myopia present. The preoperative refraction ranged from -8.87 D to -16.99 D (mean -12.28 D). The mean attempted correction was 7.83 D. Six months after surgery, the mean refraction was -2.23 D. Keratometry demonstrated stable flattening of the cornea, and pachometry showed central cornea thinning. Seventeen eyes had clear or trace corneal haze. Above results showed multi-step PRK is a safe and relatively efficient procedure for correction of high myopia, but long-term follow up will be necessary to determine the stability of this procedure.
19只近视度数超过-8.00 D的人眼接受了多步骤准分子激光屈光性角膜切削术（PRK），并进行了6个月的随访。我们根据近视度数同时进行了两到三步PRK。术前屈光度范围为-8.87 D至-16.99 D（平均-12.28 D）。平均尝试矫正度数为7.83 D。术后6个月，平均屈光度为-2.23 D。角膜曲率测量显示角膜稳定变平，角膜厚度测量显示中央角膜变薄。17只眼有清晰或微量角膜 haze。上述结果表明，多步骤PRK是一种矫正高度近视的安全且相对有效的手术方法，但需要长期随访以确定该手术的稳定性。
