方法：回顾性分析应用放射状角膜切开术治疗圆锥角膜的病例22例31眼并进行了至少12mo的随访。测量并分析术前术后裸眼视力，最佳矫正视力，自动屈光计值，角膜曲率，角膜不规则指数以及并发症。

结果：在最后一次随访中，平均裸眼视力(logMAR)由0.86±0.34 显著提升至 0.30±0.29(P<0.0001)，平均最佳矫正视力由0.47±0.21提升至0.17±0.23(P<0.0001)。平均角膜曲率由48.69±3.68D降低至 44.33±3.09D(P<0.0001)。自动屈光计测得平均等效球镜值由-5.61±2.85D显著提升至-2.29±1.95D(P<0.0001)。在整个随访过程中，中央角膜厚度和3mm，5mm区域的角膜不规则指数均无变化。术中和术后没有观察到严重并发症。

结论：在本组病例中，放射状角膜切开术是轻中度圆锥角膜视觉康复的有效治疗方法。

METHODS: Thirty-one eyes of 22 keratoconus patients with at least 12mo follow-up were recruited and reviewed retrospectively. Uncorrected visual acuity(UCVA), best spectacle corrected visual acuity(BSCVA), autorefractometer values, keratometric values, corneal irregularity indexes, and complications were analyzed pre- and post-operatively.

RESULTS: At the last follow-up visit, mean UVCA(logMAR)improved significantly from 0.86±0.34 to 0.30±0.29(P<0.0001), and mean BSCVA(logMAR)improved from 0.47±0.21 to 0.17±0.23,(P<0.0001). Mean keratometric values decreased from 48.69±3.68 to 44.33±3.09 diopters(P<0.0001). Mean spherical equivalent measured by autorefractometer was also improved significantly from -5.61±2.85 to -2.29±1.95 at the last follow-up visit(P<0.0001). Central corneal thickness and corneal irregularity index of 3mm and 5mm zones did not change during the overall follow-up time. No serious intraoperative or postoperative complication was observed.

CONCLUSION: RK is assessed as an effective treatment method for the optical and visual rehabilitation of mild to moderate keratoconus cases, according to our results in a selected group of keratoconus patients.