The UV index is the highest in summer, which is also the most harmful to eyes. When the eye receives too much light, it naturally contracts the iris. Once the iris contracts to its limit, people need to squint.
When the light is still too much, it will damage the retina. At this time, sunglasses have become a sharp tool for protecting eyes. A pair of high-quality sunglasses can filter out as much as 97% of the light entering the eyes.
1. Can everyone wear sunglasses
The answer is no, because wearing sunglasses for people with certain eye diseases will backfire. For example, people with angle closure glaucoma wear sunglasses to induce glaucoma; Wearing sunglasses for color blindness and night blindness will significantly reduce vision; The visual function of children under 6 years old is in development, and wearing sunglasses will lead to amblyopia; Those with low vision caused by cataract and fundus diseases are advised not to wear sunglasses.
In addition, the elderly are not recommended to wear sunglasses, which is easy to be dangerous due to dim light. On the contrary, some people must wear sunglasses: those who have intraocular lenses after cataract surgery, those who have dilated their pupils due to certain eye diseases, those who are engaged in skiing or mountain adventure sports, and drivers. In order to reduce the damage of ultraviolet rays to their eyes, it is best to wear sunglasses.
2. myopia can you have both eyes and sunglasses
Myopia patients need to consider the diopter when choosing sunglasses. Low or moderate myopia can wear ordinary Sunglasses without diopter without affecting safety, while high myopia (higher than 600 degrees) patients need to wear sunglasses with diopter to be safe.
3. What is the first consideration when choosing sunglasses
Sunglasses shall be selected according to their functions. Sunglasses can be divided into polarizer, sun visor and sports mirror according to their functions.
Polarizer: drivers and fishing enthusiasts are advised to choose polarizers, which can eliminate glare from all sides and make objects look clearer.
Light shielding lens: the light shielding lens can selectively filter harmful blue light and ultraviolet light, and make other visible light pass through the lens as much as possible. It is suitable for patients with macular degeneration, diabetes eye disease and excimer surgery.
Sports mirror: the frame of sports mirror is specially made, which is suitable for skiing and mountaineering.
Before wearing sunglasses, the general population is advised to consult a professional ophthalmologist and choose Sunglasses with anti ultraviolet marks to avoid unnecessary injury.
4. What color of sunglasses suits you best
The lenses have various colors. From the perspective of eye health, medium gray and Tan are the best. The lens color selection shall be based on the principle that the color of the surrounding environment is not distorted, the object edge is clear, and the signal lights of different colors can be effectively identified.
The gray lens can absorb any color spectrum evenly, and the scene seen after wearing the lens will only become dark without obvious color difference; The tan lens can filter out a large amount of blue light, improve visual contrast and clarity, and have a good effect when worn in the case of serious air pollution or foggy.
The lens color worn by the driver should not be too dark, otherwise the visual signal will be delayed from reaching the brain, resulting in speed distortion and wrong judgment. It is recommended to wear a pair of Brown Sunglasses.
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