Ortho-Keratology lenses are specialized custom-made hard contact lenses that are worn overnight that gently reshape the front curvature of the eye to temporarily reduce the amount of myopia (nearsightedness) during the day. It actually can take up to 1-2 weeks to get the eye to get to the shape it needs to be in order to see clearly throughout the whole day without any correction. The ortho-K lenses that are worn overnight will mold the cornea in a specific shape such that then when light enters the eye it lands properly on the retina allowing the patient to see clearly, whether they have nearsightedness or astigmatism.