|
As, discussed earlier, “A contact lens is
a foreign, plastic object placed on the ocular surface, therefore,
patients must be instructed properly in effective lens care &
in the necessity of follow-up visits.
A contact lens may be considered to be an optical
patch & bandage. As a patch it reduces the availability of oxygen
and the dissipiration of carbon dioxide from the cornea. As a bandage
it creates pressure on the underlying tissue & reduces wetting
of the ocular surface & dissipation of material from between
the contact lens & the cornea.
Dry eye is the leading cause of contact lens discomfort
or intolerance. Soft contacts in particular, rapidly evaporates
the tears from the eye, causing irritation, protein deposits, infection
and pain.
Contact lenses may become contaminated with organic
& inorganic deposits, & become scratched, clipped or ripped.
This lead to corneal edema.
|
