Sunglasses are both a cool accessory and a must-have item. Faced with a dazzling array of sunglasses, have you made a fuss? Style is actually just the last consideration. How to choose, I really have some knowledge.

In summer, the sunlight is dazzling. The invisible ultraviolet rays leave people nowhere to hide. Most people know that excessive ultraviolet radiation can harm the skin. However, what many people did not expect was that ultraviolet radiation can also harm our eyes. In severe cases, it can cause cataracts, burns, and even cancer.

The damage of ultraviolet rays to the eyes can be roughly divided into UVA, UVB, and UVC based on their wavelength. Among them, UVC can only reach the ozone layer, while UVA and UVB can penetrate the ozone layer and reach the eyes directly. UVB can illuminate the lens of the eye, while UBA can illuminate further, reaching the retina of the eye. The damage of excessive ultraviolet radiation to the eyes mainly includes cataracts, macular degeneration, skin lesions around the eyes, and even cancer.

The penetration of UVA is stronger and can reach the retina of the eye, causing damage. A macula is a place where photosensitive nerves gather, helping to transmit images seen by the eyes to the brain. As one ages, the macula may undergo some degenerative changes, such as deformation and bleeding, and excessive ultraviolet radiation can accelerate these changes.

Excessive ultraviolet radiation can also increase the risk of skin cancer around the eyes, especially UVB. So, sunglasses are not only fashionable or cool but also essential for the health of the eyes.