On the other side, Ying Feiyu was sent to draw an eyesight meter.

This thing is not difficult, find a standard visual acuity measurement chart on the system, cut out the appropriate paper according to the size standard, and draw it!

However, it is not enough to think that just measuring, you also have to find the right lens to actually test it, otherwise you will still get dizzy when you take off your glasses!

For example, the measured degree is 300 degrees of myopia, but after the power is sufficient, you will definitely feel dizzy when you wear it, and you can't even walk well.

Therefore, Ying Feiyu plans to grind out some lenses of different powers first, and let Ying Zheng personally try them on and test them, and find out the most acceptable power within the range of suitable eyesight!

And, once it's made, it can be reused.

I can also use it when I get glasses for ministers in the future!

So I drove to the glass factory!

"How can this machine be so useful?"

"Why haven't you heard the emperor mention it before? Quietly made something? ”

Before Ying Feiyu entered the workshop where the edging machine was placed, he heard a commotion inside, and it seemed that a lot of people had gathered.

The voice that came out was like Huang Yuan and Ying Heng's!

After stepping through the door, it was indeed a large room of craftsmen.

"Your Majesty? See Your Majesty's ......! ”

After seeing Ying Feiyu, he was stunned at first, and then hurriedly said hello and let a passage come out.

"Your Majesty? You're here too! ”

"Brother Huang, we are talking about you!"

Huang Yuan also hurriedly gave up his hand, and Ying Heng greeted him with a smile.

"I haven't asked you yet, this machine was moved yesterday, and you have already arrived today, and the news is too well-informed!"

Ying Feiyu put his hands behind his back and said with a smile.

The matter of glasses is also known to the scumbag father, mother and palace maids of Yuxiu Palace.

Outside the palace, the employees of the glass factory also knew that Huang Yuan and Ying Heng brought people over today, and the speed was really not ordinary!

"Haha! Your Majesty, I'm afraid you have forgotten the relationship between the lower officials and the director of the glass factory? ”

The corners of Huang Yuan's mouth rose, revealing a sly smile, and he snorted at his nephew on the side.

Ying Feiyu slapped her head in annoyance, "Hey! Look at this memory, this is your own nephew, if there is something new, I will definitely notify you as soon as possible! ”

"Yes! After Xia Guan got the news, he thought that Gongzi Heng should also be very interested in electrical appliances, so he pulled him along! ”

Huang Yuan took the initiative to admit.

"Brother Huang, you're not interesting enough! The production of such an important machine does not reveal any news to us in advance! ”

Ying Heng stiffened his face and pretended to be angry.

"It's not that you don't reveal it, but you all have too many things to do, and I can't always be the shopkeeper and push everything to you, right?"

Thinking that they would receive the news sooner or later, Ying Feiyu thought of an excuse early in the morning.

"The emperor's brother has to manage the entire Great Qin, and there are many matters in the government that need to be dealt with, which is much harder than ours!"

Ying Heng is very interested in these things, even if there are many things at hand, he must insist on research and manufacturing.

"Haha! Okay, you've seen the machine, you must know what it's doing, go back and take someone to study it, set up a production line, and produce it in large quantities! ”

Ying Feiyu smiled and nodded.

"Brother Huang can rest assured, I will study with Huang Yuan when I go back, and strive to pull up the production line in the shortest possible time!"

Ying Heng had already come over early in the morning, and after understanding the role of the machine, he studied its working principle and discussed it with Huang Yuan.

By now, they have roughly understood how it works, and they are waiting for Ying Feiyu to order them to disassemble and look at the internal structure and pull the production line!

"Good!"

The enthusiasm of the two is so high, and it saves Ying Feiyu from going to them in person.

"Your Majesty, you are here today, but what is the important matter?"

After talking about the machine, Huang Zimo was finally able to interject.

Yesterday, when Ying Feiyu was leaving, he taught them how to sharpen the lenses and let the craftsmen practice, he thought that His Majesty was here to accept the results of their practice!

"I'm going to build a pair of optometry frames and some inserts of the corresponding power!"

Huang Zimo and the craftsmen had already had some understanding of myopia glasses and reading glasses before, but they were still very unfamiliar with the words Ying Feiyu said this time.

Looking at their expressions one by one, Ying Feiyu understood, and explained with a smile, "To put it bluntly, the insert is a single lens with a prescription, which does not have to be embedded in the frame of the glasses, but it must be equipped with a small handle to facilitate the removal from the audition frame!" And the audition frame is a frame that can insert many inserts of different powers at the same time! ”

"For example, if my glasses are 300 degrees, you can use 200 degrees, 50 degrees, 30 degrees and 10 degrees of lenses to increase the test back and forth until you find the right prescription!"

"Usually, two eyes don't have the same power, so both eyes have to be tested!"

"If you wear glasses for the first time, if you choose too high a prescription, it may cause dizziness, which may lead to dangerous ......!"

Ying Feiyu briefly described the use of audition frames and inserts.

Huang Zimo and the craftsmen nodded again and again, understanding, "Your Majesty is still thoughtful!" ”

"I have a drawing, you follow the drawing, find the right material to build, and then I will bring it back to the palace, measure the power of my father, and match a more suitable pair of glasses!"

"Yes!"

Huang Zimo took the drawings and went to do it immediately.

With yesterday's experience, it is much easier to recreate a frame today.

"In addition to researching machines and pulling production lines, I have a task for you!"

After Huang Zimo left, Ying Feiyu looked at Huang Yuan and Ying Heng again.

"Your Majesty's orders are just that!"

"Yes, Brother Huang, you can explain what you want!"

The two pricked up their ears and listened carefully.

"Lenses are easy to say, just use high-quality glass! However, the material of the frame still needs to be studied, not only to be tough and not to break, but also to ensure that it is lightweight, even if you wear it all day, you will not feel uncomfortable! At the same time, it should also be beautiful, and divided into three, six, nine and so on! ”

In later generations, there were many, many different materials for lenses.

Glass, resin, PC, nylon, etc.

But in this era, many materials can't be made, so glass can only be used!

Crystals can also be polished into lenses, but the cost is too expensive for ordinary people to buy!

Before other lens materials are studied, Ying Feiyu plans to distinguish between high and low prices in the frame.

"Good!"

Huang Yuan immediately nodded and responded.

"Brother Huang, how is the production of your phone going over there?"

After explaining these things, Huang Zimo hadn't come back yet, so Ying Feiyu asked about other progress.

"It's going well, and it won't be long before it goes offline!"

In order to allow the people of Daqin to use the telephone as soon as possible, after the electrical appliance factory was built, Yingheng immediately arranged a large number of craftsmen, divided into three shifts, and produced day and night.

"Where's your side?"

If you want to make a call, you can't just have a telephone, and you have to pull up the phone line.

"Back to Your Majesty, after the arrival of aluminum, the production speed of telephone lines is very fast, and the minister has sent people to pull up a main line in various counties! After the phone is built, if you want to install it, you only need to pull out a branch! ”

Huang Yuan handed over his hand to report the progress.

"Hmmm! Good! ”

Ying Feiyu was very satisfied with this and nodded again and again.