[Effects of wearing long-term Ortho-K contact lens on corneal thickness and corneal endothelium].

Objective: The current study evaluated the response of the cornea to more than 3 years of Ortho-K CL wearing by investigating the changes of corneal thickness and corneal endothelium.

Methods: One hundred and thirty-two subjects were fitted with Ortho-K CL (Dk 100), which were worn overnight or daily for more than 3 years. Central and para-peripheral corneal thickness and corneal endothelium were measured before and during this period by using A scan pachymeter and non contact specular microscope.