In summer, the UV index is the highest and the eye damage is also the biggest. When the eye receives too much light, it naturally shrinks the iris. Once the iris shrinks to its limit, people need to blink.
When the light is still too much, it will damage the retina. At this point, the sunglasses become an eye protection tool, a pair of high quality sunglasses can filter up to 97% of the eye light.
1 Can everyone wear sunglasses?
The answer is no, because people with certain eye diseases wear sunglasses and can be counterproductive. For example, people with angle-closure glaucoma can induce glaucoma with color sunglasses; color blindness and night blind wear sunglasses will cause a significant decrease in vision; children under 6 years of age will have visual function during development, wearing sunglasses will cause amblyopia; cataracts and fundus diseases will cause low vision It is recommended not to wear sunglasses.
In addition, the elderly do not recommend wearing sunglasses, which is prone to danger due to darkening of the light. On the contrary, some people must wear: sunglasses for placement of intraocular lenses after cataract surgery, enlargement of pupils due to certain eye diseases, skiing or alpine adventures, and drivers. To reduce the damage of ultraviolet rays to the eyes, it is best to wear sunglasses.
2 myopic eyes with sunglasses can have both?
Myopia patients need to consider diopter when choosing sunglasses. Low or moderate myopia can wear general, diopter-free sunglasses without affecting safety, while patients with high myopia (above 600 degrees) wear diopter sunglasses for safety. .
3 What is the primary consideration for choosing sunglasses?
The sunglasses should be selected according to the function. The sunglasses can be divided into polarizers, sunshades and sports mirrors according to their functions.
Polarizers: Drivers and fishing enthusiasts recommend choosing a polarizer that eliminates glare from all sides and makes objects look sharper.
Shield: The visor selectively filters harmful blue and ultraviolet light while allowing other visible light to pass through the lens as much as possible, suitable for macular degeneration, diabetic eye disease, and excimer postoperative patients.
Sports mirror: The frames of the sports mirror are specially made for skiing and climbing.
Before wearing the sunglasses, it is recommended that you consult a professional ophthalmologist and choose sunglasses with UV protection to avoid unnecessary injury.
4 What color sunglasses are best for you?
The lenses are available in a variety of colors. From the perspective of eye health, the medium-depth gray and brown are the best. The color selection of the lens should be based on the principle that the color of the surrounding environment is not distorted, the edge of the object is clear, and the signal light of different colors can be effectively recognized.
The gray lens absorbs evenly on any chromatogram. The scene seen after wearing the mirror will only darken without obvious color difference; the brown lens can filter out a large amount of blue light, which can improve the visual contrast and sharpness, and the air pollution is serious or It works well in foggy situations.
The color of the lens worn by the driver should not be too deep, otherwise the visual signal will be delayed to the brain, causing a sense of speed, causing the driver to make a wrong judgment. It is recommended to wear a pair of brown sunglasses.
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