Contact lenses are a good alternative to traditional eyeglasses. They are normally placed on the cornea of the eye. A variety of colored contact lenses (both prescription and non-prescription) are available in the market today. They work better than any eye make-up. Like conventional contacts, certain colored contact lenses are also used for astigmatism or bifocals.
Colored multifocal (or bifocal) contact lenses are becoming very popular for several reasons. Besides correcting near vision and distant vision, they can totally change the color of eyes or can serve to improve dark or light eye color. Since the lens is used for two distinct purposes, multifocal contacts are designed in various ways. In some styles, near and far corrective parts are seen on the same area of the lens. But in some other designs, the two parts are placed away from each other.
There are mainly three common styles – the alternating, simultaneous, and concentric vision styles. In an alternating lens, the distant visual correction is fixed on the top half of the lens, while the near visual correction is on the bottom. This arrangement enables you to look up to distant objects, or look down to read a book. In the simultaneous bifocal lenses, the two corrective parts of the lens are placed very close to the center (almost at the pupil). In a concentric lens, the distant vision part is near the perimeter of the lens, while the near corrective is close to the center.
Among the many choices for colored contacts are visibility tints, enhancement tints, opaque color tints, and light-filtering tints. Visibility tint lenses do not affect your eye color. Enhancement tints are used for the purpose of improving the eye’s natural color. Opaque tint lenses are designed to alter eye color, and consist of several tiny colored dots to attain the color change. But, center part is left clear for vision purposes. Light-filtering tints are designed to enhance certain colors and diminish others.