Eyewear is used all over the world for both medical reasons and fashion purposes, especially in regions such as the US, UK, and Italy. Eyewear is a collection of various small devices and accessories worn either over or behind the eye, mainly for ornamentation or style, protection from the environment, and sometimes to increase or improve visual acuity. Various types of eyewear are available including special lenses designed to correct vision problems, protective coatings to shield the eyes from UV light, insulators to reduce glare, contacts for cosmetic enhancement, etc.
Since there are different kinds of eyewear, it is important to choose the right one. Some are disposable and must be replaced annually; others are subject to being replaced bi-annually. The type of eyewear to be chosen should be determined by the degree of visual impairment, lifestyle, and other factors. However, a little research on the Internet will help in determining what type of eyewear will provide the best comfort, fit, and protection for the wearer. In regions such as the US, the prevalence of optical shops has increased the consumerism of eyewear. For instance, according to the Federal Trade Commission, there are around 8100 conventional optical chains in the US.
The frames that are most often used for individuals who are going to wear eyeglasses regularly are made of bifocal. They consist of two separate lenses and are combined through a single frame. These kinds of eyeglasses are usually fitted in such a way that the distance between them is approximately the same as the width of the vision area. Bifocal contact lenses have an additional feature to allow a slight variation in eye prescription for users who have presbyopia. This feature makes it possible for people with presbyopia to see things clearly at an angle that is correct for their eye prescription.
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