When these lenses are taken out in the morning, the change in corneal curvature effectively corrects your vision and allows freedom from glasses or other contact lenses during the day. The effect lasts anywhere from 12 hours to as much as 3 days, depending on factors such as the magnitude of your prescription and the design of the lenses used. Currently, the most common clinical application of Ortho-K is in children, to slow the progression of myopia (nearsightedness) through corneal flattening. These lenses are custom designed to induce a shorter focal length in your peripheral vision, effectively slowing down elongation of the eye. You can read more about myopia control here.
Our optometrists at Mission Eye Care in Calgary are skilled and passionate about myopia control and are proud to have Alberta’s only 2 eye doctors residency trained in specialty contact lens fitting. They have extensive research backgrounds and clinical experience in the area of corneal reshaping and myopia management. There is no age limit on who can wear orthokeratology lenses, but we generally start as soon as myopia changes are noted, often as early as age 7. When used as directed and fit by an experienced optometrist, OrthoK is a safe and effective option for refractive error correction and slowing of myopic progression.