Femtosecond laser in situ keratomileusis versus conductive keratoplasty to obtain monovision in patients with emmetropic presbyopia

Abstract

To compare visual outcomes, complications, and patient satisfaction after femtosecond laser in situ keratomileusis (LASIK) and conductive keratoplasty (CK). Private laser clinics, Reading and Southampton, United Kingdom. In this retrospective consecutive single-surgeon comparative study, presbyopic emmetropia was treated with femtosecond LASIK or CK to achieve monovision by targeting -1.50 diopters (D) of myopia in the nondominant eye after a successful monovision contact lens trial. The CK treatments were performed with a ViewPoint CK system using the light-touch technique. The femtosecond LASIK was performed using an IntraLase FS/FS30 and EC-5000 platform with OPDCAT wavefront treatment. The mean spherical equivalent 12 months postoperatively was -1.63 D +/- 0.68 (SD) in the femtosecond LASIK group and -0.97 +/- 0.82 D in the CK group (P<.001). The mean vector value of astigmatism at 12 months was 0.32 +/- 0.32 D and 1.00 +/- 0.75 D, respectively (P<.0001). The mean induced higher-order aberration (HOA) was 0.45 +/- 0.28 microm in the femtosecond LASIK group and 1.13 +/- 0.25 microm in the CK group (P<.0001). The retreatment rate was 3% after femtosecond LASIK and 50% after CK (P<.0001). On a questionnaire administered at 12 months, 20 patients (62.5%) in the femtosecond LASIK group and 11 patients (34.4%) in the CK group reported being satisfied (P = .02). In emmetropic presbyopic cases, femtosecond LASIK monovision provided stable correction with less induced astigmatism and HOA. Eyes with CK monovision had regression and induced astigmatism.