Corneal thickness was determined by ultrasonic pachymetry. Corneal curvature was determined using a keratometer. Eyes with corneal pathology or previous intraocular surgery were excluded.

Refractive lens surgery is gaining popularity in high myopic, hyperopic ... values from topography cannot accurately measure the corneal curvature, and the calculation of corneal refractive ...

can identify minor changes in the cornea's curvature, allowing for early intervention. If keratoconus is not detected, the problem can proceed to severe stages in which the cornea becomes too thin ...