There are three types of colored contact lenses based on function. These are corrective lenses – designed to correct vision problems like refraction error, myopia (nearsightedness), hypermetropia ( far sightedness), astigmatism and presbyopea; cosmetic lenses – designed to improve eye appearance; and therapeutic lenses – designed to deliver medicine to the eyes.
Contact lenses are also classified by the length of use. There are one day disposable lenses, which are ideal for those who have eye allergies and those who could easily lose their lenses; most common contact lenses which can be used from 2-4 weeks; contact lenses that can last up to one year; and, finally, contact lenses that are very durable, which can last from 5 to 10 years.
Colored contact lenses are results of trendy fashion that even the color of the eyes is modified to suit the caprices of the owners. Like eyeglasses, they not only correct vision malfunction, but also improve the user’s eyes charm. Some have an average life of 30 to 90 days; but some must be removed before sleeping, while some later models need not so.
Colored lenses can be non-prescriptive or prescriptive lenses. Non-prescriptive lenses have the sole purpose of improving eyes appearance for the fashion conscious; while the prescriptive lenses help correct vision and at the same time improve eye appearance.
Colored contacts come in three basic tints- namely opaque, visibility and enhancement tints. Opaque are dark colored that change the color of the eyes. Visibility are lightly colored, but help the users see the lenses when inserting or removing them from their eyes. Enhancement have solid- see through tints that intensify the natural color of the eyes.
Colored contacts have some advantages over eye spectacles based on appearance, practical use and efficiency of use. Although, there are some disadvantages also. They move when blinking; thus, it is important that the size of the lenses must fit the user’s eyes. They are also affected by the intensity of light on the pupil. At night, the pupil was enlarged and became smaller during the day.
Some types of colored lenses need to be removed during night time, and need to be cleaned before inserting at daytime. Some models don’t need to be removed and cleaned up to 30 days. These are called Night and Day Colored lenses. They allow more oxygen to enter the lens/eyes that make them safe up to 30 days of continuous use.
But still, the best thing to do when planning to use colored contact lenses, is to consult a medical eye specialist.
Please visit Coco Contacts for more information and design selection for colored contact lenses and cheap eyeglasses.