Optical zone size in keratomileusis for myopia: computer-assisted evaluation and correction of myopic keratomileusis

In this article, we demonstrated the unexpected reduction of optical zone diameter in myopic keratomileusis and its causes. Mathematical evaluation of optical zone diameter was made possible through a module added to a computer program. Optical zone diameter was reduced more in smaller corrections than in higher corrections. Practical measurements were parallel to mathematical expectations except in some small corrections between -4.00 and -6.00 diopters, where it was even more reduced than calculated. We were able to enlarge the optical zone diameter using the same computer module.