Femtosecond Lenticule Extraction (FLEx) for Spherocylindrical Hyperopia Using New Profiles.

Abstract

To investigate new lenticule profiles for the treatment of hyperopia by femtosecond lenticule extraction (FLEx) for spherocylindrical hyperopia using a modified laser scan sequence. In this prospective 9-month study, 39 eyes of 22 patients with the mean age of 49 years (range: 27 to 56 years) underwent hyperopic FLEx. The mean optical zone was 6 mm (range: 5.75 to 6.75 mm) with keratometry readings and magnitude of correction adjusted mean transition zone of 2.1 mm (range: 1.80 to 2.89 mm). The lenticule thickness was set at 25 μm in the center and 10 μm at the edge. Preoperative spherical equivalent manifest refraction was +1.96 ± 1.04 diopters (D) (range: +0.63 to +4.50 D). Because of the presbyopic age, the treatment was aimed at low myopia in 75% of the eyes treated. At the final 9-month follow-up visit, the mean spherical equivalent was -0.40 ± 0.61 D (range: -1.50 to +0.75 D), with 70% of eyes treated within ±0.50 D and 89% of eyes within ±1.00 D of intended correction. The regression was +0.29 D between 1 week and 6 months but 0.03 D between 6 and 9 months. A total of 10% of eyes lost one line of corrected distance visual acuity, respectively. There were no losses of two or more lines of visual acuity or any serious intraoperative or postoperative complications. Treatment of spherocylindrical hyperopia by FLEx led to refractive results similar to published outcomes on hyperopic femtosecond laser-assisted LASIK. [J Refract Surg. 2018;34(1):6-10.].