Glass lenses don't come out in a moment.

Especially in ancient times.

Su Jinli ran to Liulifang every day, tossing for several days, until the day of the palace test was approaching, and she finally tossed a set of results.

Because better quality glass is needed to make lenses, when she tossed, she also adjusted the ratio of glass by the way and burned out the optical glass.

After strictly controlling the ratio, the fired glass finally has a relatively stable refractive index, even if it is a different batch, the error will not be too large.

With such glass, the lenses are easier to make.

Su Jinli experimented many times, and finally made lenses of various powers.

With these lenses, you can make a mold, and then press the lens directly with the mold.

Unfortunately, the technology is limited, and not all the lenses that are pressed can be used, and those that are unqualified need to be singled out.

The rest of the qualified ones have to go through some meticulous polishing before they can be used.

However, Su Jinli stayed in Liulifang for several days, and personally experimented and recorded data.

After some busyness, I still tossed the best production plan.

Whether it is the time of glass firing or the intensity of pressing, it is all set.

As long as the craftsman completes the work according to the requirements, the maximum success rate is guaranteed.

After the glasses mold was made, Su Jinli also made several sets of standard lenses for measuring power, audition frames, and eye charts.

The eye chart follows the more commonly used "E" shape, which is easy to understand and convenient when testing.

After Su Jinli tossed almost enough, he stopped running to Liulifang.

She directly sent someone to invite Doctor Sun over and generously gave him a set of equipment to test his eyesight.

Divine Doctor Sun was immediately like a treasure, and he was excited for a while, and then he remembered it and asked, "Princess, these things...... I don't know how it works? ”

Su Jinli glanced at Cinnabar, and Cinnabar smiled and introduced the usage to Doctor Sun.

Although she hasn't been following Su Jinli these days, Su Jinli tossed out the lenses and eye chart, and specially tested her.

So she knows exactly how to use those things.

Doctor Sun listened to Cinnabar's introduction and immediately couldn't wait to try it.

He took his eyesight and was excited.

He can see it clearly!

Even the bottom row, he can see it clearly!

It seems that his eyes are really well maintained.

Doctor Sun was secretly excited for a while, and suddenly felt that something was wrong.

No, he can really see things in the distance clearly, but when he looks close, he is a little blurry. It's like a word in a book, he has to be farther away to see it.

His situation is obviously different from Meng Xiran's!

Doctor Sun hesitated, but still said embarrassedly: "The princess's eye chart is good, it's just ......

Sun's eyes are okay to see things in the distance, but when he looks close, he is always a little unclear and doesn't know what kind of glasses to wear? ”

Doctor Sun was embarrassed.

After all, he is also respected as a miracle doctor, and he has been taking good care of his eyes.

As a result, I can't see things clearly.

Fortunately, a few days ago, Su Jinli gave him a magnifying glass, which helped him a lot.

Otherwise, he would have some trouble checking the medicinal herbs.

Seeing Doctor Sun's embarrassment, Cinnabar smiled and took out the audition frame and reading glasses, and said, "Doctor Sun, your situation should be presbyopia, and you can wear reading glasses."

According to your age, your degree is about 300 degrees, but you have to test it to know.

This is the audition frame made by the master, which is used to detect the power, I put the lens of 300 degrees on it, you can see it clearly first. ”

After she finished speaking, she began to help Doctor Sun put on the audition frame.

I took another book and asked Doctor Sun to see if he could read the words on it.

Presbyopia is related to age, usually at the age of 40, presbyopia is 100 degrees, at the age of 50 it becomes 200 degrees, and when it is 60 years old, it is 300 degrees.

But it's just roughly like this, everyone's eyes are different, and the prescription will be different.

Xu is Sun Shen's medical care is good, he is already in his sixties this year, but the power of his eyes is less than three hundred.

Two eyes, one is 200 degrees and the other is 2500, and after changing the lenses, you can see clearly.

Then she helped Dr. Sun measure the interpupillary distance, then took out a pair of finished glasses frames, quickly installed the lenses, and handed them to Dr. Sun.

"Doctor Sun, try it and see if it's suitable."

Doctor Sun couldn't wait to put on his eyes, and then he picked up the book and began to flip through it.

This look, sure enough, can be seen clearly, which makes him excited.

"Sure enough, I saw it clearly! These glasses are good! That's great! With such glasses, Sun's old friends can also see clearly! ”

Doctor Sun said excitedly, and after finishing speaking, he suddenly realized that these glasses were given to him by Su Jinli!

But the problem is, those friends of his can't let Su Jinli send it, right?

What is Su Jinli's identity?

She's the princess of Qin!

So he quickly restrained his smile and asked cautiously, "Is the princess planning to launch these glasses?" ”

Su Jinli smiled: "There is indeed such a plan." This set of tools for detecting eyesight can be taken back by Dr. Sun and put in the infirmary, and if there is such a patient, he can test and read in the infirmary first.

If the patient needs to buy glasses after having his prescription tested, Dr. Sun can ask him to try them at the Treasure Mirror Building. ”

Divine Doctor Sun immediately breathed a sigh of relief.

It's okay, it's okay, you can buy it.

His old friends should be able to afford a pair of glasses.

However, such a pair of glasses is probably expensive, and ordinary people are afraid that they will not be able to buy it.

Divine Doctor Sun couldn't help but think of Meng Xiran who he had seen before, and sighed secretly, feeling a little sorry for him.

He didn't know that Meng Xiran had been contributing to Zhuangyuan Shulou recently.

He is very talented and brilliant.

After reading the newspapers and magazines published by the Champion Library, he wrote several articles in one go, all of which had been selected by the Champion Library, and he got a lot of polishing fees.

Although he has not been able to cure his eyes, he has moved out of the farmhouse he rented before and rented a house next door to Shen Han.

The main reason is that Shen Han wants to prepare for the palace exam, he is afraid that it will affect Shen Han, and at the same time, in order to avoid suspicion, he deliberately did not live in Shen Han's courtyard.

After moving, he didn't bother Shen Han, but wrote a lot of drafts.

He has already gone to the Zhuangyuan Book Building to see it, and he feels that there is a lot to be done in the matter of submission.

Even, he saw the "Creation" magazine published by Zhuangyuan Shulou, and his heart began to stir.

If he can also invent a patent......