Perfecting Laser Treatment for Regular and Irregular Astigmatism

Abstract

Perfecting the treatment of regular and irregular astigmatism using laser-assisted in situ keratomileusis, photorefractive keratectomy, and small in situ lenticule extraction is possible by reducing and regularizing the asymmetric, non-orthogonal corneal shape while correcting spherical refractive error. Such perfecting treatment may be achieved by conceptually dividing the cornea into two hemidivisions and applying vector planning to optimally customize each half of the cornea to the minimum regular astigmatism possible. This innovative treatment could improve best-corrected visual acuity and minimize aberrations.