For the intense summer sun, people's eyes sometimes can not resist, because when the eye receives too much light, it will naturally shrink the iris, some of the stimulation of light may cause damage to the retina. And a pair of good sunglasses can filter up to more than 97% of the eye line, to protect the eyes from harm.
A pair of sunglasses looks very simple, that is, in a plastic or metal frame with two pieces of colored glass or plastic film.
There's more to it than that. Is it easy to add? In fact, two glass lenses can make a lot of difference, when you use sunglasses, these differences will have a great impact on you. You will find out in this article the difference between the various sunglasses that really exist.
A good pair of sunglasses must have the following four features:
Prevent ultraviolet rays from being exposed to sunlight
Ultraviolet rays can damage the cornea and retina, and high quality sunglasses can completely eliminate ultraviolet radiation.
Prevent strong light from shining When the eye receives too much light, it naturally shrinks the iris. Once the iris shrinks to its extreme state, then people need to narrow their eyes. If the light is still too high, such as the sunlight reflected by the snow, it will damage the retina.
High-quality sunglasses can filter up to 97% of the eye light to avoid injury.
Prevent glare from being exposed Some surfaces, such as the surface of the water, can reflect a large amount of light, and such a bright spot can disturb the sight or hide the object.
High-quality sunglasses can completely eliminate such glare using polarized technology, and we will introduce polarized technology later.
Eliminate specific frequencies of light Some frequencies of light will blur the line of sight, while other frequencies of light can enhance contrast. Choose the right color for the sunglasses to make it better in a particular environment.