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Paragon CRT Lenses

Corneal Reshaping lenses or CRT lenses are used to help correct myopia or nearsightedness. They are a good choice for those who do not want to wear contacts, glasses, or have refractive surgery. Your eye doctor will perform special measurements to fit you with these lenses. It will take several follow-up appointments to finalize your CRT lens prescription. But in the end, you’ll enjoy clear vision without having to wear your glasses or contact lenses during the day.

How it works
Nearsighted or myopic people generally have eyes that are too steep. To correct this steepness, the CRT lenses are designed to sit on your eye at night and reshape your cornea to a flatter shape. During the day you take out the CRT lens and your vision is clear because the cornea is now shaped correctly to match your prescription. Because the cornea is somewhat elastic, it will return to its original shape within 24-48 hours. That makes the results of CRT lens wear completely reversible. Lasik works in much the same way. The laser helps to flatten the eye by evaporating away tissue from the cornea, but because tissue is removed, the results are permanent.

Advantages
The results are reversible, which is great when you want to use nearsightedness to your advantage after you become Presbyopic.
The overall process for the CRT lens fitting costs less than having Lasik surgery. With CRT lenses, you get the effect of Lasik without the surgery. Many people can have a shift in their prescription ever after they have Lasik, which causes them to need contacts and glasses again. This can happen in a couple of years or it may not happen at all. But many people like the advantage over Lasik in that if their prescription changes, then the CRT lens prescription can be adjusted to match the change at a very low cost.

You don’t have to wear contacts during the day, which is a big advantage for those with jobs that do not allow contact lens wear, such as those exposed to chemicals. It also helps for children or adults that could not adjust well to wearing contacts during the day – such as those with smaller eyes or those who have allergies.

Disadvantages
The results are reversible, which means that you’ll always have to put your contacts in at night to fully correct your vision for the next day. It’s a lot like having to wear a retainer after having braces on your teeth.

It costs more than a year’s supply of contact lenses or a pair of glasses.

You’ll pay more up front for CRT lenses, but you’ll likely save more in the long run because you won’t be buying contacts or glasses while you do the CRT lenses.

 
The company that makes the CRT lenses, Paragon,  has a great resource here – Paragon CRT Lenses.