Contact lenses float on the surface of eye. There are two types of contact lenses, soft lenses and hard lenses. Soft lenses are made of very soft water soluble materials, which take the shape of the eye when worn. You can also get disposable soft contact lenses in the market. We can change these disposable lenses daily, after two weeks or once in a month depending on the brand and material. Hard lenses are produced from hard gas-permeable plastic and it covers only part of the cornea. Today colored lenses are also available. Contact lenses are better than eyeglasses for certain vision disorders like shortsightedness, long-sightedness, astigmatism and presbyopia. In the field of sports people prefer it because eyeglasses are hard to handle. Some prefer it for its wider view. Eyeglasses don't cover the sides. Temperature, rain or perspiration does not affect contact lenses. And lastly people buy contact lenses for the feel and look good factor. It is a fact that eyeglasses do not look good on many peoples faces. But contact lenses also have disadvantages such as:
1. The eye becomes drier than normal
2. Risks of eye allergy increase if the contact lenses are not handled properly.
3. It is not good for people with conditions such as diabetes.
Hence we can safely say that it is the condition that decides whether eyeglasses or contact lenses are better. It also depends on the user's personal choice. |
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