Understanding How Contact Lenses Work

If you have become tired of wearing eyeglasses, there is an alternative to good vision. Contact lenses can be worn by just about anyone to correct many vision problems. The first ones to be developed were formed from a hard plastic and were found to intolerable by a lot of people. The advent of the soft lens opened the doors for many more people to be able to wear these lenses.

In order for a contact to work, it must sit directly over the cornea. Between the cornea and the lens is a layer of tears. When a person blinks their eyes, the contact will move gently, and tears will be formed to wash away any impurities that may be in the eye. There are many varieties of lenses from long wearing to daily disposable lenses. What a person can afford will often decide what type they purchase. The long wearing ones must be kept sterile and clean which some feel is an added burden they do not want.

Now that it is understood how the lens remains in the eye, it is interesting to note how they work in correcting vision. The root causes of bad vision are myopia, far or nearsightedness, and astigmatism. It makes no matter what the cause of poor vision is when contacts can correct the problem.

The retina plays an important part in how things are seen. If it is unable to focus light properly, the result is bad eyesight. Things are seen as a blur. The diagnoses and the prescription given, will guarantee that a pair of contacts can be made that will correct bad eyesight and fit perfectly against the cornea.

A precision fit is required for those who suffer from astigmatism. With this eye problem, the cornea is curved, which is why the original lens that were hard and inflexible did not suit the person who had this problem. The soft lens that was introduced in 1971 opened the door for many more people to make use of this style of lens.

Nearsightedness, or myopia, is treated with a lens that is thin in the center with thick edges. For the treatment of farsightedness the opposite of a thick center with thin edges produces vision correction. All eye conditions can now be treated with contacts.

Individual taste plays an important role in what people choose to do. Eyeglasses are just as good at correcting vision as the contact lens. There are some who will intermix the wearing of the two depending on the occasion. Eyeglasses could be worn for daytime activities and the contact kept for evening wear.

The contact lens can do one thing that eyeglasses cannot do. That is the ability to change the color of the eye. Brown eyes can become blue, or blue can become green. It is possible to order these without a prescription and short term use may not cause any problems. Still, it is advantageous for all to have the eye measured so the proper size lens is worn and fear of eye problems are solved.


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