"Wait one by one, and let Merton check your eyesight." Outside the Lizheng Palace, a group of princes lined up one by one under the leadership of Li Chengqian, waiting for Morton to check his eyesight.

Now that Merton has invented the eye chart, Li Shimin just took the opportunity to check the eyesight of all the princes in case the example of Princess Changle appears again.

"The ninth brother is the last to go to school, so it's better for the ninth brother to come first!" Li Chengqian looked at the princes, pointed to the last Li Zhi and said.

Seeing this, Li Shimin nodded with satisfaction, and in recent times, Li Chengqian's performance has been very satisfactory to him, and he likes this scene of brotherly harmony very much.

Li Zhi looked around curiously, but didn't understand what it meant, so he had to walk to the place designated by Merton as he said.

"The Nine Emperors first cover their left eyes and see which direction this one is facing?" Merton pointed directly at the line of normal human eyesight.

"Down!"

Li Zhi entered school the latest, and he learned to cheat and play tricks, his eyes were not short-sighted, and he quickly said the correct answer.

Merton pointed to the upper and lower lines again, and Li Zhi replied fluently.

"Back to Your Majesty, the Nine Emperors' eyesight is not impaired." Merton bowed to Li Shimin.

Li Zhi proudly walked in front of Li Shimin and said coquettishly: "Father, how are the child's eyes?" ”

When Li Shimin heard this, he couldn't help but touch Li Zhi's head proudly, and breathed a sigh of relief, and the eldest grandson queen was even more pitiful and held Li Zhi in her arms.

However, the next examination suddenly made Li Shimin's face sink, the royal homework was very heavy, except for Li Zhi, who had just entered the school, the next four princes, except for Li You, who did not learn and did not know how to learn, the others all had varying degrees of myopia.

"Qingque, it's your turn!" Li Chengqian looked at Li Tai on the side.

Li Tai smiled bitterly and walked to the place where his younger brothers had stood before.

"In which direction is this going?" Merton asked, pointing to the line of normal human vision.

Li Tai shook his head dejectedly.

Morton pointed a few upwards, Li Tai still shook his head, and finally barely recognized it, and the result was only a little better than Princess Changle.

Merton sighed and said, "His Royal Highness King Wei is the hardest on weekdays, and his eyes are seriously damaged, and his eyesight is only one-third of that of a normal person. ”

Li Shimin said with a face full of hope: "Can Qingque be like Changle, can he restore his eyesight." ”

Merton shook his head and said: "Princess Changle is acute myopia, and there is still a possibility of recovery, and His Royal Highness King Wei is caused by hard study day after day, although the rest can be improved, but the effect is minimal." ”

"My poor child!" Empress Changsun suddenly burst into tears in distress.

"Queen Mother, don't rest assured, although the son's vision is impaired, he has gained knowledge, and he will die at night, and the son will not regret it." Li Tai said proudly.

Merton couldn't help but look at Li Tai with admiration, it was not for nothing that Li Tai was able to win the favor of Li Shimin and Empress Changsun in later generations, just these words, Merton gave him nine points, and the rest was afraid that he would be proud.

"Don't worry about the queen, you can find it early at this moment, if you can combine work and rest in the future, and cooperate with eye exercises, you can ensure that your vision will not deteriorate." Merton Road.

The next one is Li Ke, the king of Wu.

For Wu Wang Li Ke, Merton has not met a few times, and he has more of an impression that he performed exceptionally well in the annual examination of Guozijian, but he was not high-profile.

After carefully examining it, Morton nodded and said, "His Royal Highness King Wu's eyes, although they are a little short-sighted, do not affect their normal study and life, just pay more attention in the future." ”

"Thank you, Lord Mo!" Li Ke thanked him, as calm as ever.

The last one to check was Li Chengqian, Morton pointed a few times, put away the eye chart and said: "His Royal Highness the Crown Prince is at the critical point of myopia, at present, as long as it does not worsen, it will not affect daily life, but if it continues to deteriorate, I am afraid that I need to wear myopia glasses." ”

At this point, all the princes' eye examinations have ended, and almost all the princes have different myopia, except for Li You and Li Zhi.

Of course, the most serious is Li Tai, the king of Wei, whose proud talent has brought about the consequence of his damaged eyes.

"Merton, is it true that the blue finch's eyesight cannot be restored?" Li Shimin asked unwillingly.

Merton nodded affirmatively: "The myopia that has accumulated over time is absolutely impossible to recover, but Your Majesty don't worry, when Weichen returns to Mojia Village, the myopia glasses made will definitely make His Royal Highness King Wei see normally as an ordinary person." ”

"Lord Mohou, you are really sure to make a myopia mirror that makes this king's eyes as clear as ever." Li Tai said urgently.

Myopia had been bothering him for a long time, and he had long dared not hope for that kind of clarity, but Merton was able to make reading glasses to restore the old man's eyes, and maybe his own eyes to the same.

Merton nodded and said: "Myopia and reading glasses are the same reason, Weichen already knows the principle, and it is not a problem to manufacture myopia glasses in the future." ”

Li Tai said happily: "Since the age of ten, this king has been covered with a layer of gauze in front of his eyes, and the beautiful scenery in the distance can no longer be enjoyed. ”

Merton's heart moved: "There is no need for His Royal Highness King Wei to wait too long, Wei Chen can immediately let His Royal Highness King Wei experience the feeling of clarity as before." ”

"Really?"

Everyone was immediately skeptical.

Merton nodded affirmatively and said, "I don't know if there are ice cubes in the palace, some extremely transparent ice cubes!" ”

Of course, Merton couldn't conjure up myopia lenses, but at this moment, it was a cold winter day, ice cubes were everywhere, ice and glass were two equally transparent items, and he decided to create a pair of ice myopia lenses for Li Tai in a very short time.

Soon, Pang De brought out a large transparent ice cube from the imperial dining room and said: "Your Majesty, most of the ice cubes in the palace are white, only the boiling water boiled by the imperial kitchen yesterday has left an extremely transparent ice cube after it froze last night." ”

Merton nodded, ordinary water freezes white, because there are a lot of bubbles in the water, when it freezes, it is frozen before it has time to escape, which is white, and the boiling water has exhausted the air in the water as much as possible, which will be crystal clear, which is the best tool for making concave lenses.

Merton took a breath and first shaved the ice into thin slices, then rubbed his fingers back and forth on the ice, using his fingers to warm the center of the ice flakes little by little

Soon, a simple concave lens had appeared in Zimerton's hand to take shape.

"His Royal Highness King Wei, please look!" Merton handed the ice-made concave lens to Li Tai on the side.

Li Tai took it curiously, and suddenly the cold ice cubes stimulated the pain in his hands, he didn't care about the cold and piercing feeling, he couldn't wait to put it in front of him, and suddenly there was a clear scene in front of him,

"I can really see it!" Li Tai suddenly got up, holding the ice chips and looking into the distance like a child, only to see the dry branches moving with the wind fifty paces away, and he could see it clearly.

"His Royal Highness King Wei, please look here!" Merton stood in front of the chart again, pointing to the last line of the word.

"Down!"

"Right!"

Li Tai's answers were fluent, and all of them were correct.

"Haha, His Royal Highness King Wei's eyes at this moment are comparable to those of the archers in the US army." Merton laughed.

The princes were suddenly amazed, Merton actually used ice cubes to restore Li Tai's eyesight instantly, which was simply amazing.

Li Tai's heart was excited, until the ice cube in his hand melted, then he reluctantly put down the ice cube in his hand, Merton's secret technique really deserves its name, since Merton can use ice cubes to make myopia glasses, then he will definitely be able to make myopia glasses like reading glasses.

And the time frame for him to regain his sight is just around the corner.