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.
Gas Permeable lenses (RGPs) they allow oxygen to pass and reach the cornea.
Soft Contact lenses, they are known for their softness and flexibility and they also allow the oxygen to pass.
There are also white contact lenses, which are usually worn to freak people out, but you can even wear them to have a distinct look and stand out from the crowd, to find out more about white contact lenses check out this link www.whitecontactlenses.org and you will find everything there is to know about white contact lenses.
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