Extended Wear Contact Lenses
The contact lenses are being worn in two different timetables, firstly Daily wear, and secondly, Extended wear. The Daily Wear Contact Lenses are also called Before Sleeping Contact Lenses and Extended Wear Contact Lenses are also called Overnight Contact Lenses.
Some Daily Wear Contact Lenses and Extended Wear Contact Lenses has been approved by FDA in the USA. It classed some Extended Wear Contact Lenses into those contact lenses who permit more oxygen for the cornea. But mostly Extended Wear Contact Lenses got the approval from FDA can be used continuously up to seven days. This was made possible with the help of the material named as Silicon Hydrogel. Silicon Hydrogel is also considered as “Super Preamble”. FDA approved some Extended Wear contact Lenses for use 30 days without any removal. These 30 days wearing is made possible with the help of the Gas Preamble.
Extended Wear Contact Lenses got approval in 1981 from FDA. Firstly FDA approved them for 30 days but after found infection in the eyes of many people who used Extended Wear Contact Lenses for a couple nights then the FDA approved Extended Wear Contact Lenses for seven days. But the eye care professionals decided to use Extended Wear Contact Lenses is too risky during sleeping.
But there is not need to worry about the dangerousness of the Extended Wear Contact Lenses because these dangers have been removed. There were changes fetched in Extended Wear Contact Lenses are, introduction of concept of the disposability in Extended Wear Contact Lenses is causing incensement in eye’s health. Secondly, Silicon Hydrogel material is used that provides more oxygen to the retina. Thirdly, the concept of Flexibility was introduced.
But this does not mean that the dangers have been removed, after inclusion of above things no doubt these things have reduced the risks but threat remained left. Many Eye care practitioners do not recommended Extended Wear Contact Lenses to wear seven days and night consciously. The prices of Extended Wear Contact Lenses are low than other contact lenses because it does not support replacement rapidly that’s the cost of Extended Wear Contact Lenses are less comparatively other contact lenses.
Extended Wear Contact Lenses are easily available in the bazaars of the USA, Europe, Canada and other parts of the world. Extended Wear Contact Lenses can be bought online, by shipment method or manually. If the wearer is being bought online then he should have to care about the theft of credit card numbers and other related issues.
