Sunglasses are not easy to wear eyelids when wearing them properly. It is not necessary to wear sunglasses when the light is dark in cloudy or indoor conditions. Some people, regardless of the occasion, regardless of the intensity of the sun, even wearing sunglasses at dusk, evening, and watching movies and television, will inevitably increase the burden of eye regulation, causing eye muscle tension and fatigue, making vision loss, visual The object is blurred, and symptoms such as dizziness and vertigo may occur in severe cases. It is not advisable to wear sunglasses for infants and children whose visual system is not perfect. In addition to the glass sunglasses, other sunglasses lens materials are not wear-resistant, users should always pay attention to the surface of the sunglasses, when the wear affects the clarity, should be replaced in time.