What is a Lens?
Author: Shako10,30,2020Views: 1292
We have seen from the born a lot of people who wear glasses, when I was a child don't understand why some adults and children have to wear glasses, the glasses have what effect, when he had grown up, I see, that's because their eyes have a disability, some people are born, some people is caused by long-term strength is not clear, but some people just to look good, such as sunglasses and a pair of glasses it have what function all depends on the lens, then what is the lens, some people in the eye industry for many years don't understand the lens?