The Science of Corneal Refractive Therapy: How Overnight Shaping Lenses Slow Down Pediatric Nearsightedness
July 17, 2026
When a child’s nearsightedness keeps getting worse, stronger glasses are not the only option to consider. Corneal Refractive Therapy, often called CRT or Ortho-K, is a non-surgical treatment that uses specially designed contact lenses worn overnight to gently reshape the cornea while a child sleeps. In the morning, the lenses are removed, allowing many children to see clearly during the day without glasses or daytime contacts.









