"Haha, grandma, you misheard it. It's not with eyes, but with glasses!" Sun Yingying explained, "Now I tell you that you can't understand what's going on, but after I brought it over, you will understand it after you bring it with you. It's a very simple truth."

Even if Sun Yingying explains the principles of optical to the old lady of Zhenguo, the old lady doesn’t understand it!

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

Because he wanted to make gifts for his father and correct presbyopia for his grandmother, Sun Yingying wrote a letter to Bai Yixiu and asked him how the glasses were made.

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

Sun Yingying is not good at these difficult problems in science and engineering, so she left them to Bai Yixiu to do.

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

The current perfume toothpaste and nail polish have been made by Bai Yixiu. It is very powerful and makes Sun Yingying admire it very much.

Bai Yixiu immediately replied after receiving Sun Yingying's letter and invited Sun Yingying to go to the workshop to see how to make glasses.

Sun Yingying happily agreed to follow Bai Yixiu to the workshop outside the city on the agreed date.

"Bai Yixiu, I found that you have many workshops, did you buy them yourself?" Sun Yingying asked curiously, looking at the large workshop around her.

Bai Yixiu shook his head, "I made out the glass glass and mirror to make a lot of money for my father and brother. I am now the prince, and I don't want to be an official, so they can no longer reward me for their official positions and titles, so they will give me more compensation in terms of money.

Not only did I give me a lot of money, but I also gave me several farms. I modified these farms and became a workshop! Now I have a glass workshop, perfume and toothpaste, nail polish workshop, and the glass products in front of you, mirror glass workshop.

As for that cement workshop, it is only enough for me to build roads and build other courtyards. There is so much cement needed across the country, and I can’t provide it at all, so I just hand over the recipe to my father and brother and let them build the Great Zhou!"

Hearing this, Sun Yingying looked at Bai Yixiu with admiration, "Bai Yixiu, you are really excellent, you are the best person I have ever met!"

Hearing Sun Yingying's praise, Bai Yixiu was quite proud, and then nodded with satisfaction, "Yes, I also think I am very awesome. I am very grateful for the knowledge of science and engineering I learned in my previous life, so that I can create novel things in the simplest and most troublesome way. I will continue to develop them in the future. I will continue to study and find fun!"

Sun Yingying nodded and agreed with Bai Yixiu's words very much, "I also feel this way. Whenever I make greater progress in my medical skills, I feel particularly fulfilled. Hurry up, I can't wait to go and take a look."

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

Bai Yixiu brought Sun Yingying to the finished product, and Sun Yingying saw many exquisite glasses frames.

There are wood, silver, gold, and copper...
Chapter completed!