Corneal refractive therapy (CRT) or orthokeratology is a non-invasive procedure that helps align your vision as you sleep. The procedure employs the use of a gas-permeable contact lens that mildly reshapes your cornea. This procedure is done at night as you sleep which leads to clear vision during the day. A successful procedure guarantees that you will no longer need to wear contact lenses or spectacles during the day.
Before the introduction of CRT, persons with myopia had to wear a variety of lenses during the day. This process was long and not as effective as the use of this therapy. A sure sign that CRT is safe to use is that it has been vetted by the Food and Drug Administration (FDA) as a fit for human beings. Your ophthalmologist will prescribe these lenses based on the curvature of your cornea. They derive this information by studying the topographical map of the surface of your eyes.
This therapy aims to enable a decent 20/20 daytime vision for persons with myopia. The lenses should ideally correct myopia when not worn during the day. Your eyesight will still be good if you leave them on during the day. Most ophthalmologists will have you try a variety of lenses before arriving at your ideal prescription. This means that you may have to make frequent appointments to adjust your therapy accordingly.
You may not be an ideal candidate for this therapy if you have already undergone laser eye surgery. However, this does not mean that it is impossible. Consult your eye specialist before proceeding. On the other hand, you can opt for laser surgery after discontinuing CRT.
There is no age limit on the individuals who should receive CRT, but that does not mean that everyone with myopia can go for it. These lenses are ideal for persons with mild astigmatism and myopia that is up to negative six diopters. Visit an ophthalmologist who provides these services to see if you qualify for the therapy. Your consultation should not take long and they will test and educate you on what to expect.
Some conditions render you unsuitable to wear CRT lenses. Some of these conditions are:
If you have a systemic disease that may be made worse by wearing the lenses.
Eye infections or inflammations.
If you are allergic to contacts or the contact lens solution.
If your cornea or surrounding areas are injured or abnormal.
If your eyes suffer from severe dryness, redness, or irritation.
If you are not heavily dependent on other contacts or spectacles.
The period between when you start treatment and seeing the result is not the same for everyone. You may begin to notice a difference within a few days of starting the treatment. On average, most people will reach their optimum vision from 10 to 14 days of wearing the lenses. This form of therapy is not permanent. If you do not regularly wear the lenses as you sleep, your previous myopia will resurface in 72 hours.
For more information on Corneal Refractive Therapy, visit Eyecare Center of Snohomish at our offices in Snohomish, Washington. You can also call (360)568-6666 to book an appointment.