zaiamanda

The primary purpose is to protect the eyes. Excessive exposure of the eyes to ultraviolet radiation is prone to various problems such as cataracts, sunburns and cancer.buy prescription sunglasses online


If you want to use sunglasses to protect yourself from these risks, you need to find a pair of sunglasses that can block at least 99% of medium-wave ultraviolet rays and 95% of long-wave ultraviolet rays. In addition, understand the shading ability of sunglasses. See how much you can see through the frame, that is, will sunlight enter from the top or side of the sunglasses?


Do you buy sunglasses for sports or for long hours of outdoor activities? Then choose a pair of sunglasses of just the right size, and the foot cover of the temple can be made of rubber. If used for fishing or water sports, you must choose polarized sunglasses, which have stronger sun protection capabilities.


If the sunglasses are marked with the words "fashion mirror" or do not provide any information about UV protection, it is recommended not to buy them. Look for products with scratch resistance. Many lenses have very fragile coatings. We all hope that expensive goods can be more durable. Fortunately, many types of sunglasses can replace damaged lenses.



like:

The face shape determines the style of sunglasses to buy.


How to decide on eyeglasses that may safeguard the eyes


What are the lens materials of sunglasses