For summer, sunglasses are far more than just fashion accessories. A pair of high-quality sunglasses can avoid the damage of strong light and ultraviolet radiation and help protect the eyes. When buying sunglasses, one depends on the UV protection standards; second, the style and frame material of the glasses; third, the material and color of the lenses. According to these "three tricks", consumers can buy a pair of qualified sunglasses. High-end luxury brand sunglasses prefer nylon lenses.

1. Wearing glasses can correct vision 2. Wearing glasses can reduce visual fatigue 3. Wearing glasses can prevent and treat exophthalmos 4. Wearing glasses can prevent protruding eyes 5. Wearing glasses can prevent amblyopia

Presbyopia is also known as "visual acuity dysfunction". It is most directly manifested as blurred reading at close range, fatigue, soreness, tears, photophobia, dryness, and associated headaches. Middle-aged and elderly people often say "forty-seven-eight, dazzled eyes", "a lot of poor eyesight", and "lost eyesight" are all typical symptoms of presbyopia. Nowadays, many elderly people are also controlled by mobile phones. They often guard their mobile phones to grab red envelopes in various groups, which to a large extent increases the burden of using their eyes.