Lens Therapy . Optometrists counsel patients not only on the type of contact lenses best suited to their eyes, but also on the best regimen to follow. The most common type of contact lens wear is the daily wear lens . Lenses are removed each night before sleeping to be cleaned and disinfected. In an extended wear mode of contact lens wear, the patient wears the lenses continuously for up to one week.
Contact lenses designed for extended wear use have higher oxygen permeability.
However, extended wear of contact lenses is associated with more problems than daily wear. Although small, there is more risk of eye infection or corneal ulceration with use of extended wear lenses. However, following the doctor's instructions carefully should prevent this problem. Disposable lenses minimize the cleaning and disinfecting routine and associated costs, because they are discarded after being worn for a specified length of time as daily wear or extended wear. Toric lenses are specially curved lenses designed to correct astigmatism.