Fashion industry is brimming with new trends one of them is the use of contact lenses. Youngsters today prefer varied eye colors for different appearances. This has created a strong demand for disposable contact lenses or soft lenses in the market. Disposable lenses come in variety of replacement options. Replacement refers to how frequently the contact lenses could be changed. Daily disposable lenses are to be changed daily. Disposable (daily wear) have a replacement duration of 14 days or two weeks. Seven day extended wear lenses are to be replaced after a week . Planned or frequent replacement lenses are to be changed after one or more months depending upon the brand. The conventional contact lenses are replaced after an year. These replacement durations are very general n nature and vary according to the amount of lipid; the proteins; produced by the eyes.
Earlier cleaning of lens was a tedious job with various solutions. With passage of time lens manufacturers developed better quality lenses and lens solutions that are easier to use. Lenses protect eyes from UV rays of sun. UV rays from the sun are associated with formation of cataracts. Excessive exposure to UV rays leads to photokeratitis. It is a condition in which the sun burn is caused to cornea of eye leading to temporary vision blindness known as ?snow blindness?. It is easy to find whether a lens is UV blocker or not. UV protection layer is clearly visible on a lens. Also, the packaging of the lens clearly states if the lens is UV protected or not. However, these lenses only cover the cornea of the eye for protecting the other parts of eye from sun it is essential to make use of sunglasses.
Also, the 30 day continuous wear lenses are back in market. They are made up of better material than they were earlier. They allow a lot more amount of oxygen to reach the eye even when you are wearing the lenses. Thereby making them much safer and convenient to use. A few manufacturers are also making bifocal & toric lenses in disposable styles in addition to the conventional styles that last from one to several years.
The replacement schedule of a lens depends on whether i can be worn during sleep or not. There are lenses that have the caliber of correcting vision. This is known as corneal refractive therapy. Under this therapy special contact lenses are worn during night when you sleep. These lenses reshape the eyes in order to improve your vision. As a result you can see even when you are not wearing them.