You just woke up from a restful night's sleep. But as you start your day, you notice something different. You can see without your glasses or contacts. And you haven't had surgery. Well, you're not dreaming. You're just experiencing Corneal Refractive Therapy with new Paragon CRT—nighttime vision correction that gives you freedom from glasses and contacts all day without refractive surgery.
Proven Result
Paragon CRT is a specially designed therapeutic contact lens that gently and temporarily reshapes the cornea while you sleep. Through intense research and clinical testing, Paragon CRT has been proven both safe and effective for patients of all ages when worn during sleeping hours, earning this therapy FDA approval for nighttime use. The result for you is great vision 24 hours a day – without the lenses during waking hours and while they're in at night – with correction of myopia (nearsightedness) and myopia with astigmatism.
What is Paragon CRT?
Paragon CRT is an oxygen permeable contact lens used therapeutically for vision correction in Corneal Refractive Therapy (CRT).
What is CRT?
Corneal Refractive Therapy is a technologically advanced, non-invasive, non-surgical process, which reshapes the cornea while you sleep. You remove the Paragon CRT contact lenses when you awake and are able to see throughout the day without any other correction.
Is CRT Permanent?
No. The effects of CRT are temporary. Your vision will return to its previous level in as little as three days if you discontinue wearing the lenses.
Is Paragon CRT new?
While reshaping the cornea by means of a contact lens is not new, corneal reshaping with Paragon CRT has a proven record of safety and effectiveness, and it is the first corneal reshaping method to gain FDA approval for overnight Corneal Refractive Therapy.
Can everyone wear Paragon CRT?
No, Paragon CRT is not designed for everyone. The lens is indicated for people with low to moderate degrees of myopia (nearsightedness of –6.00 diopters or less), with or without astigmatism (maximum –1.75 diopters). There are no age restrictions for Paragon CRT, which makes it a great option for everyone in the family. However, each patient’s physiology and visual needs are different, so before making the decision to use CRT, a complete eye exam and consultation with an eye care professional is necessary.
Are there any risks involved with wearing Paragon CRT?
Wearing any type of contact lens involves some minimal risks. In the clinical study conducted by the FDA on the Paragon CRT lens, however, no serious adverse events were recorded.
Can I see with my Paragon CRT lenses in?
Yes. That’s one of the advantages of the Paragon CRT lens. You will be able to see clearly with your lenses on and off!
How do I care for my Paragon CRT lenses?
You will need to disinfect your lens following each use. Your eye care professional will advise you on the lens care system best suited to you.

“ [I] found that wearing glasses (correcting for distance) wasn’t working well when I also needed to do reading. Dr. M [Mendelson] suggested that I wasn’t a good candidate for laser correction but that CRT might be the answer. Dr. M had been my doctor for years with my prescription glasses. He’s tracked my vision for years. He explains things so very well. He also does a splendid job of telling me what would not be a good choice. (laser) and why. Knowledgeable, caring, pragmatic. CRT is so easy- flossing, brushing, putting in contact lenses- all part of the bedtime ritual. Then in the morning, take it out, clean it off, and I ‘m set for anything.” Prior to contact lenses I had “ glasses for distance, driving, movies, TV across the room. Got glasses in the mid 80’s, wore them only at night for driving and hockey games. Where I really noticed that the “old” solution- glasses- wasn’t working was when I was at Sharks hockey game. When I had glasses on, I couldn’t read the program. When I took the glasses off, I couldn’t see the ice clearly. I knew there had to be a better answer, and Dr. M told me that CRT might be just the ticket. He and Bob worked as a great team to make sure that CRT was performing as they expected. It worked wonderfully and is the perfect answer for me.
B.W. los altos
“ I love CRT. I am 52 years old and have worn vision correction since the age of 12. First glasses then a foray into hard lenses- not a happy experience. Then soft lenses came out and I loved them- except for swimming and sports in the wind, I lost lenses to both wind and water. Next extended wear soft lenses, so convenient until they caused blood vessels to start from lack of oxygen to the cornea. Back to glasses. I was needing bifocals, really trifocals, when I became a patient of Dr. Mendelson’s. CRT revolutionized my eye correction. First the quality of my correction is crisp and bright because reshaping the eye brings in more light. The correction is only at night, none of the irritations and hassles of lenses during a sport or with cosmetics. And finally it is flexible. Once my distance correction was stable Dr. Mendelson taught me to vary my lens wearing to tailor my correction to anticipated activities. Road trips get max distance correction and a day knitting is done with no lenses for a night. Try it- you’ll love the result!”
J.E. Sunnyvale


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