The Many Types Of Contact Lenses

Contact lenses can serve a corrective, cosmetic, or therapeutic purpose. Some are tinted slight blue, others are vivid patterns of colors. Some even offer UV protection to protect the natural lens of the eye from damage. All of these varieties are available for purchase online.

One hundred and twenty five million people worldwide use contacts. Many individuals find them superior to glasses because they are unaffected in wet weather and do not turn cloudy in heat. Further, they also allow for a wider field of sight. They are much more convenient when worn during physical activities and can treat keratoconus and aniseikonia, two conditions that cannot be corrected with glasses.

Corrective lenses improve vision. Vision may be less than perfect because of a mismatch between refraction in the eye and its length. This problem is corrected with a lens placed over the cornea, improving the focus of light on the retina.

Contacts can help individuals who suffer from nearsightedness or long sightedness, presbyopia, or astigmatism. Some individuals who are color blind can benefit from red tinted products as well. However, to correct any of these problems, they must first be diagnosed by an optometrist. An exam will be necessary to determine if anything requires fixing and what exact prescription individuals need to do so. Without knowing this it will be impossible to order the correct lenses online.

Cosmetic contacts are usually worn to change the eyes appearance. They may also double as corrective contacts, but work slightly less well because of their pattern. Theatrical lenses are a cosmetic type lens that make eyes look abnormal or confusing. Examples include horror films in which lenses are used to make eyes cloudy or demonic.

Some can even have medical applications. These may work to make the iris look larger or conceal eye damage of various types. Cosmetic lenses are less popular than corrective. However, if worn for purely aesthetic reasons, anyone can order them online without needing an eye exam. An exact prescription is unnecessary, making choosing a pair very simple.

Therapeutic types have yet another use. Soft ones can help treat and manage various non-refractive eye disorders. Bandage contacts can help keep injured or diseased corneas from being rubbed by a blinking eye. Because of this they will then have sufficient time to heal properly. These products are also used to treat neurotrophic keratoconjunctivitis, corneal ectasis, descemetocele, keratitis, dry eye, bullous keratopathy, and other conditions. Because these types of contacts are used to treat conditions, consulting a professional is first needed to determine what lens works best.

On the internet there are several brands of products available. There are also many different types of products, including but not limited to corrective, cosmetic, and therapeutic versions. The strength of prescription as well as base curve number is needed for each eye to buy a correcting product. Colored products come in a wide variety and no numbers are needed for general purpose use. Among the available shades are blue, green, gray, honey, turquoise, brown, amethyst, hazel, and sapphire.

Contact lenses come in three main types. Each of these has a unique use. More information is required before ordering some online than is necessary when purchasing others. However, an optometrist should be able to give the necessary information so that all types can be purchased on the internet.

Source: http://www.articleonlinedirectory.com/Art/663011/593/the-many-types-of-contact-lenses.html

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