CRT, or Corneal Refractive Therapy, is a non-surgical option that helps correct nearsightedness without the daytime use of contacts or glasses. CRT lenses are worn at night, and correct the curvature of the cornea while sleeping so you can see clearly during the day.
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HOW DO CRT LENSES WORK?
Ortho-K (short for Orthokeratology) is a non-surgical solution for patients with myopia (nearsightedness) that uses specially designed contact lenses (like Paragon CRT® lenses) to improve vision.
When worn overnight, Paragon CRT® contact lenses gently corrects the curvature of the cornea, resulting in a corneal shape that focuses light correctly onto the retina. When removed in the morning, distant objects will come back into focus and patients can see clearly without the use of glasses or daytime contacts.