![]() Standard clip-on sunglasses have been around at least 90 years. Standard clip-on sunglasses are the most common There are three basic types of clip-on sunglasses: SEE RELATED: How do I measure my glasses? What are some common types of clip-on sunglasses? The most important goal is to ensure the lens is completely covered by the clip-on. When buying clip-on sunglasses for prescription eyeglasses, keep in mind that the fit might not be perfect. A good rule of thumb is to add 2 millimeters to both the width and height when ordering. So if the lens is 2 1/4 (2.25) inches wide, that converts to 57 millimeters. If not, measure in inches and convert to millimeters. You will also need to know the height of the lens at the center. Measure the width of the lens at its widest point (eye size) and the distance between the lenses where they are closest together (bridge size). If so, you can determine the lens size yourself. If you have owned your glasses for some time, those numbers might have rubbed off of the frames, since they are often in contact with your face. (Frames are always measured in millimeters.) The next two-digit number is the distance between the lenses, or “bridge size.” Bridge size ranges from 14 to 24 millimeters. The first two-digit number is the lens width, or “eye size.” Eye size usually ranges from 40 to 62 millimeters. The frame size is printed on the inside of the frame of your prescription eyeglasses. It is a good idea to measure your lens width before ordering clip-ons online. SEE RELATED: UV and sunglasses: How to protect your eyes Measure your lens width to determine the proper size But the following will provide some advice and options. That can prove a challenge if you already own a pair of prescription eyeglasses and now wish to find a clip-on of the same size and shape. You should look for clip-on lenses that provide complete protection against UV rays. Otherwise, UV rays can still harm your eyes. It is important that clip-on sunglasses fully cover the lens of your prescription eyeglasses. You should never look directly at these sources of light. UVC rays can also come from some man-made sources, such as sanitizing bulbs used to kill germs, welding torches and mercury lamps. The highest-energy rays, UVC, are largely blocked by the ozone layer in the atmosphere. ![]() The higher-energy UVB rays are what cause sunburn and skin aging and can cause some eye problems as well. UVA rays have the lowest energy level but can cause the most eye damage, including macular degeneration. There are three types of UV radiation from which our eyes need to be protected. The day of recognition “reminds consumers that wearing sunglasses is not only fashionable but also a health necessity to protect the eyes from long- and short-term damage from the sun’s harsh UV rays.” The Vision Council, a nonprofit trade association for the optical industry, echoed the AAO with its National Sunglasses Day event held annually in June. Long-term exposure to sunlight’s ultraviolet (UV) radiation can lead to cataracts, corneal sunburn and even cancers of the eye or eyelid. The American Academy of Ophthalmology (AAO) recommends sunglasses that block 99% of ultraviolet rays. SEE RELATED: Clip-on sunglasses: What are they and where to buy them Protect your eyes while outdoorsĮye protection while outdoors is important. When shopping for clip-on sunglasses, it is important to ascertain that they provide an adequate amount of UV protection, as explained below. The amount of protection they provide to your eyes and the skin around them depends on the coating. Like conventional sunglasses, clip-on sunglasses come in a wide assortment of tints, sizes and shapes. This is especially true if you wear bifocals, trifocals or progressives, which have more expensive lenses. And the cost, whether purchased at the same time you buy your prescription glasses or later, is considerably less than the cost of prescription sunglasses. And fit-over sunglasses still do not eliminate the problem of carrying around two pairs of glasses, which can be cumbersome - especially when repeatedly moving between inside and outside, as you might while shopping.Ĭlip-on sunglasses slip easily into place, fit comfortably in a pocket or purse when not in use, and - if they are a proper fit - won’t scratch your prescription lenses. Wearing non-prescription sunglasses on top of your regular glasses is neither practical nor comfortable. Constantly removing your eyeglasses increases wear and tear, as well as the likelihood that you may drop them or they may be damaged by being pulled off of your face too hard. It also can put a physical strain on your prescription eyeglasses. Clip-on sunglasses provide a simple, inexpensive alternative to carrying around two eyeglass cases.Ĭonstantly switching from regular prescription eyeglasses to a separate pair of sunglasses can be a hassle.
0 Comments
Leave a Reply. |