How ortho-k works
Ortho-k (orthokeratology) uses custom rigid lenses worn only during sleep to gently reshape the cornea, the clear front of the eye. The aim is clear daytime vision with no glasses or daytime contacts. It is not surgery, and the effect is temporary: it depends on continued nightly wear.
Ortho-k lenses are FDA approved for overnight correction of nearsightedness, up to about -5.00 to -6.00 diopters depending on the design.



