Classification of contact lenses based on their replacement schedule. Depending on their replacement schedule, contact lenses are classified as daily wear lenses and disposables. Daily Wear Contact Lenses Lenses prescribed for daily wear are to be worn only during waking hours; usually up to a maximum of 18 hours. Daily wear lenses are removed at night and cleaned and disinfected after each removal. Daily wear lenses may be soft or rigid lenses; with or without tints. Disposable Contact Lenses Disposable contact lenses are those which can be replaced every month, every 1-2 weeks or even daily; depending on your need and your eye care practitioner's recommendation. Except for daily disposables, disposable contact lenses require cleaning and disinfecting after every use period. Almost all disposable lenses are soft lenses. Maintenance is similar as daily wear. The advantage of disposable lenses is that they are thrown away before getting too dirty, which reduces the chance of eye infections. However, they usually turn out to be more expensive as compared to the daily wear lenses. TINTS Contact Lenses identified by tints Contact lenses may be clear or tinted. The categories of tinted contact lenses available are: Cosmetic Lenses Cosmetic enhancement tints are translucent and are designed to change your natural eye colour. They are available in various colours such as blue, green, grey,etc. When wearing these tints, the color of your eye is a blend of the lens tint and your natural eye color. This is the reason it is almost ineffective in Indian eyes except few blue or light colored eyes Cosmetic lenses are usually soft lenses. Handling Tints: Handling tints have no effect on eye colour. They are very pale; coloured just enough to make the contact lens visible while you are handling it.