Custom LASIK involves measuring the eye from front to back with a special laser, using what’s called “wavefront” technology, to create a three-dimensional (3-D) image of the eye. Also allows the doctor to not only treat the refractive error but also the patient’s higher order aberrations. Higher order aberrations are eye issues that require special tests to diagnose and cannot be corrected with standard corrective lenses. Examples include poor night vision, glare, halos, starbursts and poor vision in low-contrast situations.