22 Dollar Glasses

Guide to Prescription Sunglasses

As we all know, exposure to the ultraviolet (UV) light can be harmful to our eyes and may cause many eye problems such as cataracts, scarring of connective tissue, and corneal flash burns. Sunglasses are an ideal way to protect our eyes from the harmful UV rays. In the past, people wearing spectacles may put on some special clip-ones. As the development of eyeglasses technology, today customers can choose prescription sunglasses instead. Prescription sunglasses will give you a clear vision while protecting your eyes from the sun lights. What is more, you can get a stylish look with available various types of prescription sunglasses.

How to get a pair of prescription sunglasses? Here are a few steps to follow. First of all, you should have an updated prescription numbers. The numbers are suggested less than one year. Then take your RX numbers to choose a frame. Most optical shops sell prescription sunglasses or you can get them online which now are widely chosen by people. You can always select a desired one within the hundreds of frames in the shops. When it comes to how to choose the perfect frames, go to search the internet and find more information teaching you to select. Once you know which kinds of frames suit you best, it would be much easier for you to select your second one. Frame has been prepared well for the fitting lenses.

Generally speaking, lenses can be made with single vision, bifocal, or progressive. According to your own prescription to choose the type you need. Polarized lenses are the best ones to prevent the UV rays. A polarized lens has the ability to restrict vibration of light caused by glare and objects reflecting sunlight. You may hear of anti-reflective lenses. Please do not make them confused. They are different. The anti-reflective lenses reflect the light on the surface of the lens itself. While polarized lenses decrease the visible glare from surfaces such as water and pavement. Polarized lenses can reduce the strain on the eyes caused by a bright environment and make our eyes feel more comfortable. Here is another kind of lenses: photochromic lenses. They are the kind of lenses can automatically darken when exposed to UV rays and become clear again when in reduced light quickly. Usually photochromic lenses are referred to as transition lenses. Now we come to the last one: tint density. There are basically three tint densities; 20 percent, 50 percent, and 80 percent. The higher percentages, the greater protection they can offer. 80 percent is the largest amount for protection against UV rays.