by Joel Harrison
7. November 2011 13:13
As we get older, it becomes more difficult for us to see near objects clearly because the crystalline lens (located behind the cornea) loses its flexibility and eye muscles have problems changing its shape to produce a clear image.
However, ortho-k contact lenses for monovision make it possible for us to avoid wearing reading glasses (which are often used in addition to contact lenses worn in order to treat myopia) or undergoing eye surgery (which, despite the recent progress in the field, carries certain risks and is not indicated for everyone).
Ortho-k (or orthokeratology) lenses have been used to correct shortsightedness for some time now, but in monovision, only one (the dominant) eye is corrected. The other eye is left myopic, allowing the patient to carry out near vision tasks, such as reading, without any problems.
Contact lenses for monovision seem to be a particularly convenient option for shortsighted presbyopic patients, who are often frustrated that they need to wear both contact lenses and reading glasses.
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