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1. The deeper the sunglasses, the better? Not so.

In the hot summer, more and more people wear sunglasses to protect their eyes. Some people think that the deeper the lens, the better, but this is not the case. Experts pointed out that different lens colors have different visual perceptions and applicability, and the choice should be made according to individual needs. The doctor also further explained the characteristics and wearing recommendations of the "6 lens colors".

Experts pointed out that many people are puzzled about sunglasses and believe that the darker the color, the better. According to the domestic CNS standard, the filters are divided into 0 to 4 grades. Generally, lenses with a light transmittance greater than 40% (without a UV400 label) are more fashionable than functional. It is best to choose a light transmittance of 8-40%, and gray lenses are the most versatile for sunglasses, with a light transmittance of 8-40%. , suitable for use in most conditions, as for the 4th grade, light transmittance is only 3-8%, not suitable for driving, usually used in strong light environments such as mountaineering, skiing, etc.

2. The ski club recommends sunglasses with red lenses.

How much does UV light damage the eyes? The doctor explained that daily visible light contains high-energy ultraviolet rays, and ultraviolet rays are divided into UVA, UVB, and UVC according to different wavelengths. The ozone layer can isolate most of UVB and UVC, while UVA has a longer wavelength and stronger penetrating power. It may cause eyelid malignant tumors, photokeratitis, pterygium, cortical cataracts, and other diseases.

Physicians emphasized that everyone must protect against ultraviolet rays, especially school children who are a little mydriatic to correct myopia and should also wear sunglasses to block the light. In addition, if you can't remember the selection skills, the simple method is to choose lenses with UV400 stickers, which means that they can filter ultraviolet rays with wavelengths below 400nm, and then choose the transmittance and color according to different situations. However, it should be noted that sunglasses can only block the light in front of them, and ultraviolet rays will still enter the eyes from the upper and lower sides. It is recommended to wear a hat with a brim or an umbrella when going out, which can block ultraviolet rays more effectively.

[Suggestions for wearing sunglasses in 6 colors]

1. Gray

It absorbs evenly on various color wavelengths and does not affect color vision.

2. Dark green

Similar to the gray effect, it can absorb red light and blue light, but it has a great impact on color vision and is not suitable for people with color weakness.

3. Brown

It has better absorption of blue light, which can increase the contrast between the sky and ground objects, soften the vision, and help people with weak red, but it will worsen the vision of people with weak green.

4. Yellow

It can block harmful blue light, has high contrast sensitivity, and can still maintain clear vision during fast movement, but it will affect night vision and traffic sign discrimination.

5. Blue

Blue light can drive directly into the eyes and is not recommended.

6. Red

Increases contrast, suitable for environments under strong sunlight, such as skiing.