The basic idea of contact lens derived from Leonardo da Vinci’s sketch of contact lenses in 1508, which came into reality after 300 years, finally invented by Czech chemist Otto Wichterle.
Many commercial lenses are tinged with flamboyant colors to enhance visibility when immersed in cleaning and storage solutions. Some lenses now have a thin surface layer having the capacity to protect the eye from harmful UV rays. The contact lenses serve more than the basic purpose of therapeutically use. It is widely used due to their appearance and practicality when compared with spectacles, for it gets less affected by wet weather. Sporting finds a new definition with it. Moreover, it has the compactness and corrective quotient accurate for some topical ophthalmologic conditions such as keratinous and anise Konia that cannot be accurately cured with glasses.
Contact lenses
Contact lenses, at its earlier stages, were fragile and expensive, and the early versions of PMMA lenses though received much appreciation for its accurateness but were proved troublesome for shirking the oxygen penetrability into eyes that could cause a number of adverse clinical effects. Glasses leave a deep impact on our noses and ear-ribs causing a feeling of pain when in continuous use. But this type of irritation is hardly expected when you are wearing contact lenses. By wear time we can divide it into three types—daily wear extended wear and continuous wear. A daily wear contact lens is designed to be removed before getting to sleep.
A longer wear lenses find new definition when they are made of silicone hydrogels that allow for even longer wear periods of up to 30 nights and it is called a continuous wear.
I hope all of you would find this information very helpful and you would be thinking about wearing contact lenses.
See u later
Bookmars this sample color contact lenses
