Comparative study of visual acuity and aberrations after intralase femtosecond LASIK: small corneal flap versus big corneal flap.

Aim: To study the effect of different flap sizes on visual acuity, refractive outcomes, and aberrations after femtosecond laser for laser in situ keratomileusis (LASIK).

Methods: In each of the forty patients enrolled, 1 eye was randomly assigned to receive treatment with a 8.1mm diameter corneal flap, defined as the small flap, while the other eye was treated with a 8.