Sunglasses are a kind of eye care products that prevent eye damage caused by strong sunlight. With the improvement of people's material and cultural level, sunglasses can be used as a special accessory for beauty or personal style.
For the strong sunlight in summer, people's eyes sometimes can't be parried, because when the eyes receive too much light, it will naturally shrink the iris, and some irritating light may damage the retina. A pair of good sunglasses can filter up to 97% of the eye's rays to protect the eyes from harm.
A pair of sunglasses looks very simple, that is, two pieces of colored glass or plastic in a plastic or metal frame. There is more than this
Add simple? In fact, two glass lenses can make a lot of difference, and these differences can have a big impact when you use sunglasses. You will learn about the differences that really exist between sunglasses in this article. A good pair of sunglasses must have the following four functions:
Folding to prevent exposure to ultraviolet light in sunlight
Ultraviolet rays can damage the cornea and retina, and high-quality sunglasses completely eliminate ultraviolet light.
Folding to prevent exposure to strong light
When the eye receives too much light, it naturally shrinks the iris. Once the iris has contracted to its limit, then people need to blink. If the light is still too much, such as the sunlight reflected from the snow, it will damage the retina. High quality sunglasses filter up to 97% of the incoming light to avoid injury.
Folding to prevent glare
Some surfaces, such as the water surface, can reflect a lot of light, and the resulting bright spots can disturb the line of sight or hide objects. High-quality sunglasses can completely eliminate such glare using polarizing technology, and we will introduce polarizing technology later.
Folding to eliminate light at a specific frequency
Light at certain frequencies blurs the line of sight, while light at other frequencies enhances contrast. Choose the right color for your sunglasses to get the best results in your particular environment.
If the sunglasses don't provide UV protection, it will expose you to more UV light. Cheap sunglasses filter out some of the light, causing your iris to open to receive more light. This will also allow more UV rays to enter, increasing the damage that the UV rays cause to the retina.
Therefore, there is indeed a difference between the various sunglasses. Choosing the right, quality sunglasses will give you maximum protection for your specific environment.