Look for sunglasses labeled UV 400. That means those sunglasses block every light rays with a wavelength 400 nanometers or less. Other sunglasses still protect well if they state they block 99 to 100 percent of UVA and UVB light. You need 99 to 100 percent of those rays blocked for a multitude reasons. You may want to check out Cosmoptical website for more.
UV exposure can cause cataracts.
Over time, UV exposure can destroy your eyes’ retinas.
UV exposure can cause tissue to grow over your eyeball.
It protects the sensitive skin around your eyes from the sun’s damaging rays that can cause skin cancer.
It protects the sensitive skin around your eyes from developing wrinkles.
The Perfect Fit
Improperly fitting sunglasses can let UV rays reach your skin and eyes. According to WebMD, your sunglasses should line up with your brow and not touch your eyelashes. They should fit snuggly and not slip down when you lean forward.When shopping online, you can still find the perfect fit easily. Look at the inside of the frames of your current prescription glasses or sunglasses. You should see a series of numbers. The first indicates the designer and model number, For instance, RB 5121 2012 means Ray Ban model number and year 5121 2012. The next set, 50-22, indicates a lens width of 50 and a bridge width of 22. The final set, for example, 150, indicates the arm length. That is the length of the piece which extends from the lens to behind your ear. The glasses that fit perfectly that you already have mean you can easily shop online and still get a perfect fit. Unlike clothing designers, eyeglass makers use standard sizes that apply to every set of frames made.
