Basics of Contact Lenses

Basics of Contact LensesAuthor: Lesley LyonA corrective, cosmetic or therapeutic lens placed in the cornea of the eye is called a contact lens. It is a thin, transparent, plastic disc. Contact lens serves the purpose of conventional glasses but it is lightweight and almost invisible. In fact, some commercial lenses are tinted, generally to light blue color, to make them more visible while immersed in solution.

Nearly two percent of the people through out the world use contact lenses. There are many reasons for people opting for contact lenses. Majority of the people choose contact lenses for enhancing their appearance and making it more attractive.

Also, contact lenses are less prone to wet weather, provide a wider vision field, do not steam up and are more suited for many sporting activities. In addition to this, certain ophthalmologic conditions can be accurately corrected with contact lenses. Contact lenses are in varied designs. Spherical contact lenses are typically round in design and have the ability to correct myopia (near sightedness) or hyperopia (far sightedness) Bifocal: These lenses correct presbyopia - an age related defect of the eye and have different near and far vision zones.

Orthokeratology lenses reshape the cornea during sleep thus avoiding daytime wear of the lens. Toric contact lenses correct myopia, hyperopia and astigmation. Many of these lenses come in colors that enhance the natural color of the eye.

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Oгypeц comment`s:

На каком-то сайте я уже читал почти такую же подборку данных, но все равно спасибо

16.02.2010