Orthokeratology
Orthokeratology
Orthokeratology, also known as Ortho-K (pronounced: or-tho-ka-rah-toh-loh-jee), is a non-surgical procedure involving the use of specially designed contact lenses to temporarily reshape the cornea and improve vision. The term "Orthokeratology" is derived from the Greek words ortho meaning "correct" or "straight", and kerato meaning "cornea".
Procedure
Orthokeratology involves the use of rigid, gas-permeable contact lenses that are worn overnight. These lenses gently reshape the cornea, the clear front surface of the eye, while the patient sleeps. Upon removal of the lenses in the morning, the cornea temporarily retains the new shape, often allowing clear vision throughout the day without the need for glasses or contact lenses.
Uses
Orthokeratology is primarily used to correct refractive errors such as myopia (nearsightedness), hyperopia (farsightedness), astigmatism, and occasionally presbyopia. It is also used in the management of keratoconus, a progressive eye disease that causes the cornea to thin and bulge.
Benefits and Risks
The main benefit of Orthokeratology is the temporary correction of refractive errors without the need for daytime glasses or contact lenses. However, the effects are not permanent and regular overnight wear of the Ortho-K lenses is required to maintain the results. Potential risks include eye infections, corneal abrasions, and changes in corneal shape that can affect vision.
See Also
External links
- Medical encyclopedia article on Orthokeratology
- Wikipedia's article - Orthokeratology
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