It does not stop the progression of myopia in children or adults. Conversely, Ortho-K is accomplished with a contact lens device. Since the eye is flattened and retains the flattened contour for a period of time the process is sometimes referred to as corneal molding. The mold is a specially designed contact lens. It is somewhat larger than a standard lens but not very different in appearance.
Comfort is generally excellent.
The lens is working as it is worn, whether you are sleeping or awake. At that point, the wearing time is gradually reduced until a minimal-wear time is established that maintains the corneal shape and good functional vision. This assures continued clarity without the gradual blurring that may accompany surgery. The cornea can easily be fine-tuned by minor modifications to the retainer mold. These topographic maps or pictures are used to determine if the corneal shape is changing in the correct manner.