Over the past 50 years, millions of contact lens wearers were satisfied with their reliability. Only a small percentage of people have had difficulty in wearing lenses, but even if problems are rare, they can become serious. Almost all complications were due to poor hygiene and contact lens maintenance. People who wore lenses did not clean and disinfected them, according to doctor’s advice, did not have annual eye checks recommended by the doctor.
allergies to chemicals contained by maintenance solutions;
conjunctivitis;
cracks in the lenses;
irritation of the cornea;
protein deposits on the lens;
damage of the top layer of the cornea by the lens that is not well placed;
complications in the eyelid;
eye irritation;
dry eye;
foreign body sensation in eyes.