Soft contact lenses need a great deal of care, otherwise they will have to be changed frequently. The average renewal time is from of 2 to 3 years. Gas permeable contact lenses are made of plastic. They are softer and more comfortable to wear than hard lenses. They need care and are sensitive to scratches.
Dust particles under the lens can be a problem.
These lenses have to be renewed every 3 to 4 years. In conclusion, it is very important to disinfect contact lenses and cases because the lenses may be a vector to infection. They need to be looked after with great care and cleaned regularly. You should never change your cleaning products without notifying your prescriber, some products not being compatible with each other or with certain lenses. It is important to have regular checking carried out by a specialist who will test the lenses and the condition of the eye.