How to purchase and use correctly the sunglasses

The sun gradually strong, more and more people are will be ready when you get a pair of sunglasses, not only can keep out the sun, can dress up the face. However, not all people know how to choose and use the sunglasses. Don't understand is just to follow sunglasses factory glasses look at together. Clear purpose of choose and buy is sold on the market of sunglasses there are mainly two categories, one is 'shade', people usually take in the sun by adjusting the pupil size to adjust the luminous flux, when more than the human eye light intensity adjustment ability, will cause harm to the human eye. Sunshade lens can have the effect of keep out sunshine, to alleviate the fatigue caused by eye excessive regulation or the damage caused by the strong light stimulus; Another kind is the light color sunglasses, also is the more popular varieties in recent years, the main adornment effect, also can be used when the sunlight is not strong. Therefore, before buying sunglasses sunglasses purchase should first clear aims. Sunglasses improper use common sense to wear sunglasses was susceptible to eye disease, cloudy and there is no need to wear sunglasses indoors. Some people all occasions, regardless of sunlight intensity, even during the evening and in the evening, also wearing sunglasses when watching a movie, TV, it will inevitably increase burden of eye accommodation, cause eye muscle tension and fatigue, make the vision loss, blurred vision, serious can appear the symptom such as dizziness, not long. For visual system development still is not perfected of infants, children and should not be wearing sunglasses.
related: sunglasses polarized sunglasses brand