Ultraviolet (UV) radiation can damage the cornea and retina, and high-quality sunglasses can completely eliminate UV exposure.
When the eye receives too much light, it naturally contracts the iris. Once the iris contracts to its limit, people need to squint. If too much light remains, such as sunlight reflected off snow, it can damage the retina. High-quality sunglasses can filter out up to 97% of incoming light to prevent damage.
Some surfaces, such as water, can reflect a lot of light, and these bright spots can obscure vision or hide objects. High-quality sunglasses use polarized technology to completely eliminate this type of glare, which will be discussed later.
Some frequencies of light blur vision, while others enhance contrast. Choosing the right tint for your sunglasses will make them work better in specific environments.
If sunglasses don't provide UV protection, they expose you to more UV radiation. Cheap sunglasses filter out some light, causing the iris to open to receive more light. This allows more UV radiation to enter, increasing the damage to the retina.
Therefore, there are indeed differences between various types of sunglasses. Choosing the right, high-quality sunglasses for the specific environment will provide the user with maximum protection.
According to international standards, sunglasses are classified as personal eye protection products. The primary function of sunglasses is to block glare from sunlight.
