There are a few steps that usually follow the procedure. First is an hour long medical test, a few things are taken into consideration as to your reason for switching from glasses to contact lenses, and the second being whether you can afford contact lenses or not. After this an exam known as refractomery is taken and then after a few medical procedures, the important step is the testing of the contact lens which is necessary to determine the curvature and diameter of the contact lens. The last and final step is the periodical exam depending on the type of contact lens you choose to wear.
There are many kinds of contact lenses. They are:
PMMA Contact lenses, it is made from very durable plastic, but it does not allow oxygen to reach cornea but instead when you blink the oxygen from your tears reach the cornea. It is also known for its cheap cost and durability.
Thursday, December 17, 2009
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