Orthokeratology lens repair your eyes while you sleep!
Orthokeratology is a technique that uses special contact lenses to reshape your eyes while you sleep and it restores your vision by morning. Ortho-k lenses costs an average of Rs15, 000 to Rs 20,000 and can be used for a year.
Do your eye lenses give you complications all day long? Do you hate wearing glasses? What’s the next best thing to do? Orthokeratology lens or ortho-k can be the solution for all your problems. Orthokeratology is all set to turn your dreams into a reality if you are suffering from nearsightedness.
Orthokeratology is a technique that uses special contact lenses to reshape your eyes while you sleep. This allows you to have better vision during the day while not wearing corrective lenses. The effects of Orthokeratology are only temporary, so the lenses must be worn often to maintain good vision.
For many this will mean wearing lenses nightly, though it varies from person to person. Some patients will only need to wear the lenses 3 to 4 times per week. The lens recently launched in India and available only through a few hospitals in Bangalore, is not the answer to all vision problems. It is meant for people who have low to moderate shortsightedness or myopia. It does not help those with long-sightedness (those who can see objects at a distance) and people who wear bi-focals.
“The Orthokeratology lens corrects your refractive error and you can work through the day with near perfect vision. The more often you wear them, the longer you can go without lenses or glasses. If you wear CRT lenses continuously for a week, you will probably be able to see without corrective glasses for the next one week,” said Dr Vishnu Rajan, cornea and refractive surgery consultant.
The lenses, which are semi-soft, are not for all and have to be specially designed and fitted on suitable candidates. “It’s good for young people who do not want to be seen with spectacles and are not comfortable wearing contact lenses,” Dr Rajan said.
Overnight lenses are gas permeable lenses made up of a special hard type of plastic. They gently press on the cornea and, reduce its curvature so that the focal length increases, refocusing the light directly on retina. It also shortens the eyeball with quite an efficacy. Doctors believe that the best candidate for such technology are people who have low amounts of myopia, about 4 diopters or less, but people with slightly higher amount of this, say, 5 or 6 diopters are also found to be benefiting.
The lenses are not suitable for people who are suffering from hypermetropia, because, their corneas are too flat and further flattening will only worsen the case.
Explaining the advantages of the lenses, Dr. Rajan said “There are many advantages of ortho-k over other techniques to correct your eye vision. First, as you are wearing the lenses while you are sleeping, you won’t have to grope for your specs, in case you wake up in the night and need to see. Second, you don’t have to fear the exposure to smoke, dust or water as you are not going to wear them throughout the day. Third, the people who want to wear the GP lenses (Gas Permeable lenses) but face difficulty wearing it, given the sensation and awareness resulting from the direct interaction of the eyelid with the edge of the lenses during blinking, can also wear it because during the sleep, blinking is not required. Fourth, it’s also beneficial for those who have the problem of dry eyes,”
How it works?
Like refractive surgery, Orthokeratology flattens the cornea of myopic patients, enabling light rays entering the eye to focus properly on the retina. The lenses are gas-permeable, snug-fitting, and somewhat flattened in the center to put pressure on the cornea and change its shape. Ortho-k is generally a gradual process, and may require a series of different lenses, though that will depend on the specifics of the patient and the type of lenses being prescribed.
Reasons to consider Orthokeratology
Ortho-k is also an ideal choice for those who can't (or don't want to) wear corrective lenses during the day, but don't mind wearing them at night, including people who work in dirty or dusty environments and those who are active in sports. And unlike refractive surgery, Orthokeratology is reversible if you are unhappy with the results.
Who is not a candidate?
Not everyone is eligible for Orthokeratology. If you have severe dry eye, reduced corneal sensitivity, allergies that are aggravated by contact lenses or contact solutions, or certain other eye or medical conditions, ortho-k may not be the right choice for you.
Cost of treatment
Fitting a patient for Orthokeratology lenses is a lot more involved than a standard lens fitting. Multiple office visits are required, and sometimes multiple sets of lenses as well. Ortho-k costs an average of Rs15, 000 to Rs 20,000 and can be used for a year.
Prabha Eye Clinic and Research Center
504, 40th Cross, 8th block
Jayanagar, Bangalore -560070 Map