How to buy sunglasses

1. The human body has an instinctive response to protect itself. When the eyes encounter strong light, the through-hole will naturally become smaller, which will reduce the ultraviolet energy entering the eyes

When the eye is equal to the door is opened greatly, let alone ultraviolet ray enters, can imagine to the eye harm.

2 sunglasses can prevent ultraviolet ray, because lens on add a special besmear film, and inferior sunglasses not only cannot prevent ultraviolet ray, still let lens transmittance drop seriously, make pupil greatens, ultraviolet ray can shoot in great quantities instead, your eye is damaged.In addition, inferior lens still makes

Nausea, forgetfulness, insomnia and other symptoms of visual fatigue.

3. The color of the sunglasses should be light gray, tan or smoke, followed by green, amber, blue, etc. Red is only used for sunbathing or snow.

It's better to use polarized sunglasses when taking the bus, because they can reduce the glare.

Your sunglasses are too light if you can see your eyes clearly when you put them on.

6. It's better to remove your sunglasses when the sun is setting, otherwise, our eyesight will be affected in places where the light is weak.

7 should go to the regular optician shop to choose regular manufacturers with the function of preventing outside line sunglasses.Welcome to JH!