workmanship - How to make the logo and print the sunglasses

In daily life, sunglasses are a very common type of glasses, which can block the damage of the sun\'s rays to the eyes, and are very popular among people. Many people wear sunglasses, especially in summer. So what\'s wrong with wearing sunglasses?

In summer, sunglasses are one of the necessary sunscreen products for people to travel. Many people think that the darker the lens, the better it can prevent the damage of ultraviolet rays to the eyes. The ophthalmologist of Xinqiao Hospital of Third Military Medical University said that the darker the sunglasses, the better, and the darker lenses may cause damage to the eyes.