Contact lenses can be therapeutic, cosmetic, or corrective in function. Some may be tinted slightly blue, others can have vivid patterns of color. Some may even supply UV protection and protect the eyes natural lens from damage. All varieties can be purchased online.

Around one hundred and twenty five million individuals around the world wear contacts. Many people find them better than glasses because they remain unaffected in bad weather and do not cloud up in heat. Also, they allow wearers to have a wider field of vision. Their use is much more convenient during physical activities. Also, they can treat the conditions of keratoconus and aniseikonia, impossible to do with glasses.

Corrective forms of lenses help improve vision. Less than perfect vision is generally caused by mismatching between eye refraction and its length. Typically this problem is fixed by placing a lens over the eyes cornea, improving how light focuses on the retina.

Individuals who have nearsightedness, long sightedness, astigmatism, or presbyopia can use this product to correct their conditions. Individuals who have color blindness can benefit by using products that are tinted red. However, to properly improve these problems, individuals first need to be diagnosed by a licensed professional. Exams will be required to find out if there are issues and the exact prescription necessary for correction. Without knowing this it will not be possible to order the right pair online.

Cosmetic contacts are generally worn for the purpose of changing the appearance of eyes. They can double as corrective but will not work as well for this purpose because of their coloration. Theatrical lenses are a cosmetic lens that work to make eyes appear abnormal or confusing. This is done in horror films when the eyes are desired to look demonic or cloudy.

Some patterned products can have medical applications as well. These can alter the size of the iris to make it look bigger or cover up damage to the eyes. Cosmetic lenses are purchased at a much lower rate than the purely corrective ones. However, when worn for aesthetic reasons only, anyone can purchase them online without needing an examination. Exact prescriptions are not required, and choosing a pair is quite simple.

Therapeutic products have an additional use. Soft ones are worn to manage and to treat non-refractive eye disorders. Injured or diseased corneas are protected from damage by rubbing or blinking eyes with a bandage type contact. This allows the cornea to heal properly without complications. These products also treat bullous keratopathy, dry eye, keratitis, descemetocele, corneal ectasis, neurotrophic keratoconjunctivitis, and other conditions. The contacts used offer a type of treatment, and therefore, a professional must determine what works best as a solution.

Over the internet many brands and types of products are available. These include therapeutic, cosmetic, and corrective versions, among others. Strengths of prescription and the base curve number are needed to buy correcting products. Colored versions come in many hues and require no prescription number if worn for visual effects only. Among the available colors are sapphire, hazel, amethyst, brown, turquoise, honey, gray, green, and blue.

Contact lenses are highly versatile and are available in three major types. Each has a unique use and application. More information is needed to order some of these on the internet than is required for the purchase of others. However, optometrists should give necessary information so that any type can be purchased off the internet.

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