Extended Wear Contact Lenses
Extended Wear Contact Lenses are designed for longer time of usage. Extended wear toric contact lens is specially designed for patients with astigmatism and would like to have contact lenses with longer usability. Extended wear contact lenses are designed for overnight wear also that means that contact lenses wearer can sleep with these contact lenses. What mainly differentiate extended wear contact lens is that it permits more oxygen to reach eye's cornea. Duration of extended wear contact lenses varies as approved by FDA that it can be used without removal for up to seven days. Extended wear colored contact lens made of specially silicone hydrogel, is considered "super-permeable," substance are approved for up to 30 days of wear without removal. Toric color disposable extended wear contact lenses that are gas permeable lens are also permitted for 30 days of wear. These types of 30-day type of extended wear are also known as “continuous wear contact lenses."
Expiration of extended wear contact lenses usually between 7 to 30 days and wearing these types of contact lenses beyond this expiry limit can be dangerous to eyes pupil. This might cause infections that vary from an irritating case of conjunctivitis to more severe conditions that can cause blindness. Now a days Colored contact extended lens wear are mostly disposable. Extended wear aphake contact lenses are designed for aphakic correction, it is one the eye deceases Contact extended wear lenses not only removed at least once a week, but can be thrown out each week and replace with a fresh pair. Contact lenses extended wear, bifocals contact lenses, color contacts and toric contact lenses are available under various brands and are manufactured by different contact lense manufacturers usually based in United States.
Color contact extended lens wear in disposable version helped to solve many health concerns about extended wear. Previously extended wear lenses specially extended wear toric contact lenses were replaced on weekly basis and these lenses were re-used for week and months but new research suggest not to use these extended wear contact lenses more than 30 days even with the regular cleaning . Contact extended wear lens toric are sold less than the disposable toric contact lenses. Toric contact lens for extended wear is also available in different colors and can be used for continuous month with regular cleaning with contact lense solutions.