To compare the efficacy of femtosecond laser assisted LASIK (Fs-LASIK) and sub-Bowman-keratomileusis (SBK) for patients with hyperopia and astigmatism.

A prospective study was designed.Twenty-seven eyes receiving Fs-LASIK and 27 eyes receiving SBK for the correction of hyperopia with astigmatism were enrolled in this study. The hyperopia of all patients were(+ 1.50~+ 6.50)D, and astigmatism were (+ 1.00~+ 6.00)D. The visual acuity, refraction, ocular anterior segment, fundus, intraocular pressure, corneal thickness, corneal topography and binocular visual function were measured before and 6 months after the surgery.

Six months after the surgery, the average residual refractive error was (-0.31±0.68)D. The percentage of the patients whose refraction was within ±0.75 D was 88.1%, and the percentage of the patients with uncorrected distant visual acuity better than 0.4 and uncorrected near vision better than 0.5 was 91.5%.The refractive spherical equivalent degree of hyperopic astigmatism in patients with Fs-Lasik surgery reduced to post operative (-0.12~-0.42)D, and (-1.00±0.64)D in patients with SBK surgery. The near vision improved from preoperative (0.16~0.25) to (0.56±0.12) in patients with Fs-LASIK, and increased to (0.45±0.23) in patients with SBK. The differences were statistically significant in diopter changes between preoperation and postoperation (P<0.05). The fusion and far stereopsis was improved in patients with glasses after the two kinds of surgery (P<0.05).

Femtosecond assisted LASIK and SBK surgery for hyperopic astigmatism can improve uncorrected visual acuity, and improve binocular image fusion and stereopsis through reducing the refractive difference of two eyes. The Fs-LASIK is more effective than SBK with quicker recovery.

Femtosecond laser assisted LASIK; Sub-Bowan keratomileusis; Astigmatism hyperopic; Correction; Vision, binocular