Medical experts suggest that when buying sunglasses, you can judge based on whether the vision is clear. To buy high-quality sunglasses, the only thing that can be done is to buy sunglasses at professional optics shops and regular eyewear shops.
The human body has an instinctual response to self-protection. When the eyes encounter strong light, the pupils will naturally become smaller, reducing the amount of ultraviolet energy entering the eyes. Once you wear glasses without anti-ultraviolet function, the pupils will be enlarged, plus this kind of The glasses do not isolate ultraviolet rays. At this moment, the eyes are like a wide open door. If ultraviolet rays enter, the damage to the eyes can be imagined.
Sunglasses can block ultraviolet rays because a special coating film is added to the lenses. Inferior sunglasses not only cannot block ultraviolet rays, but also seriously reduce the transmittance of the lenses, making the pupils larger, and the ultraviolet rays will be injected into the eyes in large quantities. Damaged. In addition, inferior lenses can cause visual fatigue such as nausea, forgetfulness, and insomnia.
The color of the sunglasses is superior in light gray, brown or light smoke, followed by green, amber, blue, etc. Red is only used for sunbathing or snow.
Polarized sunglasses are best used in cars because they can reduce glare.
If you can see your eyes very clearly after you put on your sunglasses, your lens is too light.
When the sun goes down, it is best to remove the sunglasses, otherwise, our eyesight will be affected in the place with weak light.
Go to a regular eyewear store and choose regular sunglasses made by regular manufacturers.
Pay attention to the lens surface when selecting.
Skinny people with long faces are suitable for round frame sunglasses.