To correct refractive errors, such as myopia, hyperopia and astigmatism, many people rely on conventional eyeglasses and contact lenses. These are the most popular non-surgical methods to improve eyesight. The emergence of orthokeratology (also known as ortho-k), however, has allowed people with vision problems to ditch their corrective eyeglasses or contact lenses.
Read on as Myopia Institute answers the most frequently asked questions about ortho-k.
What Is Orthokeratology?
Ortho-k is a form of corneal refractive therapy that utilizes gas-permeable contact lenses for overnight use. This helps reshape the front surface of the eye, which enhances the vision. The effect can last for at least one to two days. For best results, your eye specialist may advise using ortho-k lenses every night.
Note, however, that the gas-permeable contact lenses used in this corneal reshaping therapy are highly porous, which allows oxygen to pass through them. This makes this type of contact lens safe even when used overnight.
Which Vision Problems Can Ortho-K Correct?
Ortho-k lenses provide temporary correction to myopia or nearsightedness. This is a refractive error that occurs when the eyes do not bend or refract light properly to the retina. About 25% of people in the country has this eye disorder. Nearsightedness is also often detected between the age of eight to 12 years old.
Apart from myopia, ortho k lenses can also correct lesser degrees of astigmatism, hyperopia (farsightedness) and presbyopia.
What Can You Expect When You Begin Ortho-K?
Corneal topography uses a special instrument to measure the curvature of the cornea. This is a painless procedure that creates a map of your eye’s surface. It will take at least three pairs of temporary lenses, however, before achieving the maximum vision correction effect of ortho-k.
To learn more about orthokeratology and other myopia-related treatment, contact your local eye health care specialist and schedule an appointment.