What Benefits Do Contact Lenses Have

What Benefits Do Contact Lenses Have



The attractiveness of​ contact lenses remains to​ improve with the growth of​ technologically advanced methods for​ vision​ correction​ and​ for​ proper handling and​ maintenance of​ lenses. They are particularly effective in​ certain​ occupations, and​ are desirable for​ cosmetic reasons in​ many others.

However, there are many individuals for​ whom contact lenses should not be recommended; all potential candidates should be thoroughly screened by an​ ophthalmologist.

Medical conditions in​ which corneal lenses are recommended include absence of​ lens or​ “aphakia,” absence of​ iris or​ “aniridia,” congenital absence of​ pigment, myopia and​ hyperopia, some types of​ astigmatism, cone-shaped deformity of​ the cornea or​ better known as​ “keratoconus,” and​ turned-in​ eyelashes.

Contraindications include allergic and​ inflammatory conditions (such as​ corneal infection), abnormal overflow of​ tears (epiphora), presbyopia, severe exophthalmus, pterygium, or​ local neoplasm.

The Structure

The corneal lens is​ made of​ lightweight, paper-thin​ plastic about 10 mm. or​ less in​ diameter. “Scleral lenses” are larger and​ are used for​ special medical conditions and​ some sports.

When properly fitted, contact lenses “float” on​ the fluid layer of​ the eyeball and​ are held loosely in​ place by the capillary attraction​ of​ the tears and​ the upper lid. The lens moves with the eye and​ is​ centered over the cornea.

Contact lenses have many advantages over framed lenses. Here is​ the list of​ some of​ the benefits:

1. They do not steam up when the wearer goes from the cold outside to​ a​ warm room.
2. They are automatically cleaned with each blink of​ the eyelid.
3. They can be worn safely during sports.
4. They eliminate the need for​ less attractive lenses.
5. Peripheral vision​ is​ increased
6. The incidence of​ breakage is​ extremely low.

Some disadvantages and​ dangers in​ wearing contact lenses include the following:

1. The adjustment period in​ learning to​ use them properly is​ longer
2. Contact lenses are more expensive than framed lenses
3. Contact lenses can be lost easily such as​ down the sink drain​ or​ in​ a​ swimming pool
4. in​ the event of​ a​ chemical splash to​ the eye, the chemical agent may seep beneath the lens to​ cause extensive damage before the contact lenses can be removed.

Moreover, in​ special cases like driving, the wearer of​ contact lenses should carry a​ card indicating that he wears contact lenses. this​ may help in​ an​ encounter with the police, if​ his license happens to​ be marked “must wear glasses.”

Should he be involved in​ an​ accident or​ become unconscious and​ unable to​ remove the lenses, prolonged wearing may be injurious to​ the cornea.

Briefly, recommendations for​ the wearers of​ contact lenses are:

1. Wash hands thoroughly before touching the lenses, whether applying them or​ removing them
2. Cleanse lenses only with the recommended sterile solution. it​ should be “noncaustic.”
3. Dry the lenses when they are removed and​ to​ be stored
4. Keep the storage kit clean
5. Do not wear lenses beyond the prescribed time. Usually, the maximal average is​ 10 to​ 16 hours.
6. Do not wear lenses when sleeping or​ suffering from an​ eye infection.

The improper use of​ contact lenses can cause corneal abrasions and​ ulcerations, which result from poorly fitted lenses, improper technique in​ applying or​ removing the lenses, and​ insufficient tear circulation​ under the lenses.

Although the advantages outweigh the disadvantages, precautions and​ safeguards must still be understood by everybody and​ not only the wearer of​ contact lenses.

The contact lenses must be regarded as​ a​ medical prosthesis, not a​ cosmetic device. The care and​ precaution​ given to​ any medical “prosthesis” must be used with contact lenses.




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