These contacts are designed to be worn for an extended period of time without the necessity of taking them out in order to go to sleep. Extended wear contact lenses or continuous wear contact lenses are usually made of highly oxygen permeable silicone hydrogel which provides high breathability and comfort.
The length of time in which a person can continuously wear a pair of lenses depends on their eyes’ tolerance and the lens type. The most popular type of continuous wear contact lenses are indicated for 7 days use, however there are also extra breathable 30 days continuous wear contact lenses available – very comfortable and convenient for people who would like to forget that they are wearing contacts at all. They consist of less water than traditional contact lenses, which makes them less prone to dehydration throughout the use period.