Corneal Refractive Therapy (CRT)


Corneal Refractive Therapy (CRT)

Corneal Refractive Therapy is a non-surgical process that uses a therapeutic lens to gently reshape your cornea while you sleep, resulting is the temporary correction of nearsightedness (with or without moderate astigmatism).

The CRT lenses are similar in appearance to standard contact lenses. They are removed upon waking, often offering freedom from glasses and contact lenses during the day.




CRT is for:

  • Children or adults who are mildly nearsighted.
  • Those who don’t want to wear glasses or contacts during the day.
  • Those who have no health issues affecting their eyes.

What to expect:

CRT lenses are made from an overnight contact lens material designed specifically for this purpose. You’ll put the lenses in every night before you go to bed.

When you remove your lenses in the morning, your reshaped cornea will allow light to focus correctly on the retina. The result is clear, natural vision for all or most of your waking hours.

Most patients have rapid improvement in the first few days of treatment and achieve their optimum vision in 10 to 14 days.

Your lenses should be chemically disinfected after every use. Your doctor will let you know what care system is best for you, and when your lenses should be replaced.

Realistic expectations:

The goal of CRT is to reduce your daytime dependence on corrective lenses. However, we cannot guarantee you will have the results you desire. The vast majority of our patients are extremely happy with CRT.

There is a small risk involved when any contact lens is worn. It is not expected that the lenses used in CRT provide a risk greater than other contact lenses. Because this procedure is reversible, some patients may notice changes in their vision late in the day.

Alternatives to CRT:

CRT is not the only option for correcting nearsightedness. To learn about other procedures go to the surgical and laser vision correction procedures section of our Web Site. If you would like to learn more about vision correction procedures from sources other than our practice, we encourage you to linkto a number of Web sites we feel provide factual and up-to-date information. You may also choose to,  or to learn more about this exciting procedure.

For more information about the corneal refractive therapy go to



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Eye Conditions & Treatments

The doctors at Metropolitan Eye Center have helped thousands of people enjoy better vision. When you have a problem with your eyes, you know you can turn to us for help. Leading the way with new medications and surgical procedures, Metropolitan Eye Center can diagnose and treat a wide range of eye diseases and eye conditions. Advances in technology have impacted all aspects of vision care. Surgical procedures that once required a hospital stay and lengthy recovery are now performed by our doctors on an outpatient basis, with most patients returning to their normal activities within hours.

We continually invest in the most state-of-the-art diagnostic and surgical equipment. And our doctors go through rigorous, ongoing training to ensure that we’re doing everything we can to improve our patients’ vision and quality of life. We’re committed to providing the most advanced care available.

For your convenience, we’ve developed an overview of common eye conditions. Click on any of the conditions on this page to learn more about symptoms, causes and treatments.

You know your eyes better than anyone. If they don’t see, feel or look as well as you’d like them to, schedule an appointment with one of our doctors by using our online scheduling or by calling 586-774-0393.


Treatment of many eye conditions is covered by insurance, including Medicare. If you have questions about what is covered by your private healthcare insurance, contact your plan provider, or provide us with a copy of your insurance card and we’ll check for you. We accept most major insurances. You can e-mail our customer service department at or call us at 586-774-0393 with questions.

If you have questions about your Medicare coverage, call 1-800-MEDICARE (1-800-633-4227) to speak to a Medicare Customer Representative. You can also go to to find out more about Medicare coverage. Our staff is also available to help you determine whether the eye care you need is covered by Medicare. You can e-mail who will reply within 48 hours, or call us at 586-774-0393.

Your out-of-pocket expenses for Medicare or private insurance will depend of the type of insurance you have, whether you have supplemental insurance and whether you have a deductible on your policy. We’ll be glad to process all insurance claims for you. We also accept cash, personal checks, Visa and Mastercard.

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