"Haha, grandma, you heard wrong. It's not with eyes, it's with glasses!" Sun Yingying explained. "Now I tell you, you don't understand what's going on, but you'll understand it when I bring it. It's a very simple truth."

Even if sun Yingying explained the optical principle to the old lady of the town, the old lady didn't understand it!

Others have good eyesight, no presbyopia, no myopia, and even no astigmatism.

Thinking of making gifts for his father and correcting presbyopia for his grandmother, sun Yingying wrote a letter to Bai Yixiu asking him how his glasses were made.

Before, she gave Bai Yixiu all the information about the production of some glasses and the division of various degrees.

Sun Yingying was not good at these problems in science and engineering, so he left them to Bai Yixiu.

I have to say that Bai Yixiu is a talent in science and engineering.

Now the perfume toothpaste and nail polish are all made by Bai Yi Shu, which is very powerful, which makes Sun Yingying admire it very much.

Bai Yixiu replied immediately after receiving sun Yingying's letter and invited sun Yingying to go to the workshop to see the production of glasses.

Sun Yingying readily promised to follow Bai Yixiu to the workshop on the outskirts of the city on the agreed date.

"Bai Yixiu, I found that you have many workshops. Did you spend money on them?" Sun Yingying asked curiously and looked around at the large workshops.

Bai Yixiu shook his head. "I made glass and mirrors and made a lot of money for my father and brother. Now I'm a prince, and I don't want to be an official, so they can't reward me in terms of official position and title, so they give me more compensation in terms of money.

Not only gave me a lot of money, but also gave me several Chuang-tzu, so I revised and revised these Chuang-tzu and became a workshop. Now I have a glazed glass workshop, perfume toothpaste, nail polish workshop, and this glass product, mirror glasses workshop in front of you.

As for the cement workshop, it's only enough for me to build roads and other hospitals. The whole country needs so much cement, and I can't provide it at all, so I'll directly hand over the formula to my father and brother and let them build Da Zhou! "

Hearing this, sun Yingying looked at Bai Yixiu admiringly, "Bai Yixiu, you are really excellent. You are the best person I have ever seen!"

Hearing sun Yingying's praise, Bai Yixiu was quite proud, and then nodded with great complacency, "yes, I think I'm very powerful. I'm very grateful for the science and engineering knowledge I learned in my previous life, so that I can get new things in the simplest and easiest way, and I will continue to develop them in the future. I'm constantly studying and looking for fun!"

Sun Yingying nodded and agreed with Bai Yixiu very much. "I also have this feeling. Whenever I make greater progress in my medical skills, I have a special sense of achievement. Come on, I can't wait to see it."

When sun Yingying came, she took a vision test with her family, measured the distance between the pupils of her two eyes, and then measured the width of her cheeks, which is necessary for glasses.

Bai Yixiu took sun Yingying to the finished product. Sun Yingying saw many exquisite spectacle frames.

There are wood, silver, gold and copper

Sun Yingying chose a pair of golden spectacle frames, which were also inlaid with emeralds.