Cornea Refractive Therapy (CRT)
Cornea refractive therapy, also called “corneal refractive therapy,” “Corneal Reshaping Therapy” or “CRT” is a trade name used by a company to describe their product which treats blurry eyesight through a well-known therapy known as Orthokeratology (OrthoK). CRTs are rigid, gas permeable orthokeratology lenses (OrthoK lenses) used to alter the shape of the surface of the eye (cornea) through a process commonly known as corneal reshaping and cornea refractive therapy (CRT). By changing the shape of the surface of the eye, the vision of the wearer is altered with the goal of managing nearsightedness (myopia), farsightedness (hyperopia), astigmatism and/or presbyopia (adult vision usually corrected with bifocal or multifocal eyeglasses). CRT treatment involves inserting a rigid gas permeable contact lens in the patient’s eye before going to bed which gently, painlessly and reversibly reshapes the surface (cornea) of the eye while asleep. In the morning, the wearer removes the lenses and, in most cases, is able to achieve 20/20 vision for most of their waking hours.
Management of Corneal Reshaping Therapies
The curve of the cornea (front surface of the eye) is largely responsible for refractive errors such as nearsightedness (myopia), farsightedness (hyperopia) and astigmatism, the culprits behind blurry eyesight. For nearsightedness (myopia), the cornea may be steeper than average, causing light to enter the eye producing a blurry image for the retina. For farsightedness (hyperopia), the cornea may be flatter than average, which, depending on the age of the individual, creates problems focusing at different ranges of vision (near vs far). Astigmatism is when the cornea is steeper in one meridian yet flatter in another, causing images that enter the eye to be distorted to some degree.
Corneal reshaping, either surgically (LASIK, PRK or Orthokeratology) can minimize or eliminate the refractive error caused by a cornea that is too flat, too steep or astigmatic. These methods seek to flatten the curve of the cornea in nearsighted (myopic) individuals surgically or non-surgically with orthokeratology lenses (OrthoK lenses) in a process commonly known as corneal reshaping, cornea refractive therapy (Paragon CRT), corneal reshaping therapy and Vision shaping treatment (VST).
Experienced Eye Doctors Prescribing Cornea Refractive Therapy (CRT)
Options such as OrthoK, cornea refractive therapy including Paragon CRT (vision shaping treatment) are particularly helpful when seeking to improve eyesight in children, and reduce change in vision, specifically myopia in children and may, in some cases, reduce the risk of children with myopia advancing to high myopia.
Schedule an Appointment
If you are interested in managing your vision or the vision of a loved one with nearsightedness and concerned about vision changes, please contact us to learn more and if this treatment is right for you or your child. Call (301) 859-4060 to schedule an appointment.