In the Qilin Hall, Ying Yu explained a few words and found that everyone was still looking at him in confusion.

Ying Yu shook his head helplessly, and then ordered the eunuchs in the hall to get the wooden box prepared in advance.

Under the expectant gaze, Ying Yu took out a piece of paper from the wooden box.

This is a modern table of vision magnitude, with special symbols of different sizes on it.

"The Qin paper seems to be written with a mountain character, but it is not prominent. These words are a bit similar to the words of my Daqin, but they seem to be much more concise and cannot be recognized below."

Nei Shiteng recognized it for a long time, but he didn't recognize a single word.

Yao Jia and other recognized erudite masters also shook their heads, not knowing what those hieroglyphs mean in the visual magnitude table.

"You guys don't need to recognize it specifically. This is just a symbol depicted on the table of vision magnitude, not a special text. These texts have nothing else to do except to help measure vision magnitude."

Seeing these most learned people in Daqin run to a table of vision and recognize words, Ying Yu was a little amused and laughed.

"So that's the case. I'm ignorant. I just don't know how to measure the visual intensity of these symbols of different sizes?"

Neishten asked again.

"It's very simple. When measuring, you only need to hang the eye level meter flush with the measuring person's eyesight, and then the measuring person needs to stand seven feet away from the eye level meter."

"If you are measuring the left eye, use your right hand to attach it to the right eye, and look from the first row to the last row. If you are not able to see clearly when you reach that row, then the visual intensity of the left eye is the same as the scale of that row. Just move it when measuring the right eye."

"In this way, the vision data of the left eye and the right eye can be obtained, and the glasses are matched based on these vision data."

Ying Yu replied.

Although using the vision digit table to measure a person's vision condition will have considerable deviations.

But in Daqin, whose technological capabilities are far from fully developed, this is the best way to measure vision for the time being.

"Since that's the case, then you have to find a way to create glasses that suit me as soon as possible. After seeing the clear world, I want me to face that blur now, but I can't do it."

Ying Zheng said with a smile.

This is completely what he said.

If his eyes have been aging like this and his vision has gradually become blurred, Ying Zheng can still accept it. After all, it is natural for human beings to be old and blurred, even if he is an emperor, he cannot avoid the vulgarity.

But since he came into contact with the clear world after wearing glasses, Ying Zheng has no way to force himself to continue to blur. As the saying goes, once the vast sea was hard to make water, except that Wushan was not clouds, Ying Zheng now feels like this.

"That's of course. After the father's glasses are ready, my son will personally send them to you."

Ying Yu smiled.

"Your Highness the Crown Prince is indeed a sage of the world! These glasses are not only ingenious, but also extremely practical!"

"With the rise of my education career in Daqin and my Daqin's strong advocacy for reading, students' enthusiasm for learning has increased unprecedentedly, but the probability of suffering from this eye disease has also become higher and higher."

"Some time ago, a student in the south of Gusu City also suffered from extremely serious eye disease because he used his eyes too much. As a result, when he walked back to the school, he accidentally fell into the well because he couldn't see the road clearly. He drowned soon after, and this tragedy was more than this family."

"If these glasses can be popularized in the future, I believe this will not happen again. This will undoubtedly have a huge role in changing lives for the students of Daqin and officials who have entered the court. It is also of great significance to the people of Daqin as a whole."

Meng Yi said with a happy face.

The other officials in the court also looked at each other and nodded in approval.

After all, as one of the patients, officials are more aware of how much myopia and presbyopia have hindered their daily lives, so they are naturally full of respect for Ying Yu who created glasses.

"I have handed over the production process of glasses and vision meter to the Academy of Engineering, and explained it to them many times in detail. I believe they should be able to grasp the key points soon."

"When their production process is fully mature, glasses should be able to start mass production."

Ying Yu said with a smile.

"Your Highness the Crown Prince, if these glasses can really be popularized, it will be a blessing for scholars like us."

Chen Ping said with a smile.

"Farting, why has it become a blessing for you scholars? We soldiers usually have to read military and military books. We have to constantly study maps when marching and fighting. We use our eyes no less than you scholars!"

"Besides, recently, my eyes were blinded by wind and sand. Isn't it okay to wear a pair of glasses to avoid wind and sand? Why has glasses become a blessing for you scholars?"

Wang Jian was immediately dissatisfied with this and began to slap his beard and stare.

As an old minister of the four dynasties, he was a meritorious general who swept away the six kingdoms for Ying Zheng and unify the six kingdoms. Wang Jian is now over 70 years old and is approaching the eighty mark. Therefore, his eyes are more serious than Ying Zheng's aging.

If Wang Jian hadn't had been retaining the habit of training for so many years, he would have been afraid that his vision would have been blurred at this moment.

But even so, under the erosion of time, Wang Jian's eyes were already quite poor at this time.

On weekdays, it is almost impossible to see people clearly. If you want him to bend his bow and arrows like before, it is almost impossible.

Therefore, after hearing Ying Yu talk about the various benefits of these glasses, especially when he saw Ying Zheng wearing glasses and discovering the new world, Wang Jian was immediately moved.

Originally, he thought that with the fact that Ying Yu was his grandson-in-law, he might be able to ask Ying Yu for a deck in advance.

Unexpectedly, Chen Ping suddenly said something like this, which made Wang Jian very angry.

"Justice was just now inappropriate. We shouldn't have forgotten that soldiers also need glasses. Please forgive me for the old lieutenant!"

Chen Ping was frightened and immediately apologized to Wang Jian.

Wang Jian was not only an old minister of the four dynasties, but also the greatest hero of the Crown Princess' unification of the six kingdoms.

In terms of seniority, this old man who is not angry and powerful is still above the First Emperor.

Looking at the entire Qin Dynasty, no one can match him except Ying Zheng and Ying Yu!

Even if Ying Yu saw Wang Jian, he would still respectfully call him "Elder General".

This person is able to enter Xianyang Palace at will and drink with His Majesty the First Emperor.

Chen Ping can't afford to offend such a person!

What's more, Wang Jian's temper is famous for being very hot. At the beginning, he had just had some small conflicts with Feng Quji and ran to the court to fight Feng Quji alone. In the end, Feng Quji had to take the coptis chinensis in a mute manner and apologize to Wang Jian.

What if Wang Jian really gets angry and Wang Jian wants to fight him one-on-one?

Not to mention whether he can beat this veteran who has been through the battlefield for a long time, even if he can beat him, he will not dare to take action.

After all, the title that Wang Jian was holding was so scary, and he had to suffer in the end.
Chapter completed!