I'm going to get glasses for the summer vacation. Who can talk about spherical lenses and aspherical lenses?

Actually, how can I put it? These two kinds of lenses have their own advantages and disadvantages. My own understanding is that spherical lenses are relatively cheap and there are many markets. After all, it's worth it. But what I really want to say is that your friend is right to let you match aspheric surface. Because you can match an aspheric surface, you must match an aspheric surface.

Let me tell you why. Look at two pictures first.

(The picture was taken on the official website of Yue Mingjingtou. )

You'll probably know after reading the picture, because if the spherical lens is too high, the surrounding objects may be distorted, and the imaging is not clear, which will affect the visual effect; However, aspheric lenses will not have this situation no matter how many degrees, which improves the sense of reality of vision.

In fact, an aspherical lens is described in one sentence, just like the phrase in official website, "Wear it, and the world will be as you see it", a bright moon lens.

Hope to adopt, thank you.