Percival S P, Vyas A V
Department of Ophthalmology, Scarborough Hospital, England.
J Refract Surg. 1996 Jan-Feb;12(1):86-90. doi: 10.3928/1081-597X-19960101-16.
Radial keratotomy for low myopia can produce good results with few side effects. For higher myopia, predictability becomes less accurate and side effects more common.
A retrospective study of 111 eyes of 76 patients were divided into two groups. Group I had 79 eyes with myopia of -5.00 to -8.00 diopters (D); group II had 32 eyes with myopia -8.25 D to -13.00 D. One hundred eleven eyes were followed for 1 year and 90 eyes were followed for 2 years.
Sixty-seven (84.8%) eyes in group I and 12 (37.5%) eyes in group II achieved a refraction within the range of -1.00 D and +1.00 D. Ninety-two percent of group I and 44% of group II achieved an uncorrected visual acuity of 20/40 or better. Three percent lost spectacle-corrected visual acuity. Four eyes developed a hyperopic shift of 1.00 D or more between 2 months and 2 years. Seven other eyes developed a hyperopic shift of 1.00 D or more between 2 months and 5 years.
Eight-incision radial keratotomy is an attractive option for treatment of myopia up to -8.00 D. For levels above -8.00 D, the results are poorer; there may be a variable period before refraction stabilizes.
放射状角膜切开术治疗低度近视可取得良好效果且副作用较少。对于高度近视，可预测性降低，副作用更为常见。
对76例患者的111只眼进行回顾性研究，分为两组。第一组79只眼，近视度数为-5.00至-8.00屈光度（D）；第二组32只眼，近视度数为-8.25 D至-13.00 D。111只眼随访1年，90只眼随访2年。
第一组67只眼（84.8%）和第二组12只眼（37.5%）的屈光度数在-1.00 D和+1.00 D范围内。第一组92%的患者和第二组44%的患者裸眼视力达到20/40或更好。3%的患者失去了矫正视力。4只眼在2个月至2年之间出现了1.00 D或更大的远视漂移。另外7只眼在2个月至5年之间出现了1.00 D或更大的远视漂移。
八切口放射状角膜切开术是治疗近视度数达-8.00 D的一种有吸引力的选择。对于高于-8.00 D的度数，效果较差；屈光可能需要一段可变的时间才能稳定。
