"Come one by one. Let Meton check your eyesight." Outside the Legislative Hall, a group of princes lined up one by one under the lead of Li Chengqian, waiting for Meton to check their eyesight.
Since Meton had already invented the visual acuity meter, Li Shimin could use this opportunity to check the eyesight of all the princes to prevent Princess Changle from happening again.
"Ninth Brother is the last to enter the academy. Why don't you go first?" Li Chengqian looked at the group of princes and pointed at Li Zhi.
Seeing this, Li Shimin nodded in satisfaction. Recently, Li Chengqian's performance had made him very satisfied. He especially liked this scene of brothers getting along well.
Li Zhi looked around curiously. He didn't understand what this meant, so he could only follow Meton's instructions and walk to the spot.
"Ninth Prince, cover your left eye first and see which direction this eye is facing." Meton pointed directly at the line with normal eyesight.
"Facing down!"
Li Zhi was the last to enter the academy. Furthermore, he was very crafty in his studies. His eyesight wasn't short-sighted, so he quickly gave the correct answer.
Meton pointed at the two lines above and below. Li Zhi answered fluently.
"Your Majesty, Ninth Prince's eyesight isn't damaged." Meton bowed to Li Shimin.
Li Zhi proudly walked in front of Li Shimin and said sweetly, "Father, your son's eyesight is fine."
Hearing this, Li Shimin couldn't help but pat Li Zhi's head proudly and let out a sigh of relief. Empress Zhangsun even hugged Li Zhi lovingly.
However, the following examination immediately caused Li Shimin's expression to darken. The imperial family's curriculum was extremely heavy. Other than Li Zhi, who had just entered the school, the other four princes, other than the ignorant and incompetent Li You, all had varying degrees of myopia.
"Qingque, it's your turn!" Li Chengqian looked at Li Tai.
Li Tai smiled bitterly and walked to the position where his younger brothers were standing before.
"Which direction is this Chi facing?" Meton asked as he pointed at the line where normal people could see.
Li Tai shook his head dejectedly.
Meton pointed up a few, but Li Tai still shook his head. In the end, he barely managed to recognize them. In the end, he was only slightly better than Princess Changle.
Meton sighed and said, "His Highness Emperor Wei is the most hardworking. His eyes are severely damaged, and his vision is only one-third of a normal person's."
With a face full of hope, Li Shimin said, "Can Qingque be like Changle, able to recover her eyesight?"
Meton shook his head and said, "Princess Changle has acute myopia, and there is still a possibility of recovery. However, His Highness Emperor Wei has been studying hard day after day. Although he can get better with rest, the effect is minimal."
"My poor child!" Empress Zhangsun was so distressed that tears immediately fell from her eyes.
"Mother, don't worry. Although your son's vision is damaged, he has gained knowledge. Even if I hear the truth in the morning, I will die in the evening. Your son has no regrets." Li Tai said proudly.
Meton couldn't help but have a whole new level of respect for Li Tai. It wasn't without reason that Li Tai was able to gain the favor of Li Shimin and Empress Zhangsun in the future. Meton gave him nine points for this speech, and the remaining one point was for fear that he would become arrogant.
"Your Majesty, don't worry. It was discovered early. If you can balance work and rest in the future, and combine it with eye exercises, you can ensure that your vision won't worsen." Merton said.
The next one was King Wu, Li Ke.
Meton hadn't met King Wu, Li Ke, many times. His impression of him was that he performed exceptionally well in the Imperial College's Annual Examination, but he wasn't high-profile.
Meton checked carefully and nodded. "Although King Wu is a little short-sighted, it won't affect his normal studies and life. Just pay more attention in the future."
"Thank you, Marquis Merton!" Li Ke cupped his hands and thanked him, as calm as ever.
The last one to be checked was Li Chengqian. Meton pointed a few times and put away the vision chart. "His Highness is at the critical point of short-sightedness. At present, as long as it doesn't worsen, it won't affect his daily life. But if it continues to worsen, I'm afraid that he will need to wear glasses."
At this point, all the princes had finished their eye examinations. Except for Li You and Li Zhi, almost all the princes had different degrees of short-sightedness.
Of course, the most serious one was Emperor Wei, Li Tai. The talent he was so proud of brought about damage to his eyes.
"Meton, is it true that Qingque's vision can't be restored?" Li Shimin asked unwillingly.
Meton nodded affirmatively. "It's absolutely impossible to restore the accumulated short-sightedness. But Your Majesty, don't worry. When the Minister returns to the Mo Family Village, he will make a pair of glasses that will allow His Highness, Emperor Wei, to see normally."
"Marquis Merton, are you sure you can make a pair of glasses that can make I's eyes as clear as before?" Li Tai asked eagerly.
His short-sightedness had been troubling him for a long time. He didn't dare to hope for that kind of clear vision. But Meton could make a pair of glasses that could make old people's eyes as clear as before. Maybe he could also make his own eyes recover.
Meton nodded. "Short-Sightedness and reading glasses are similar. The Minister already knows the principle. It won't be a problem to make glasses in the future."
Li Tai said happily, "Since I was ten years old, I's eyes have been covered with a layer of gauze. I can no longer enjoy the beautiful scenery in the distance. Marquis Merton, please don't make I wait for too long."
Meton had an idea. "Emperor Wei doesn't have to wait for too long. The Minister can immediately make His Highness, Emperor Wei, feel as clear as before."
"Really?"
Everyone was doubtful.
Meton nodded affirmatively. "I wonder if there are ice cubes in the palace. Some extremely transparent ice cubes!"
Of course, Morton couldn't conjure a pair of spectacles out of thin air. However, it was winter, and ice was everywhere. Ice and glass were equally transparent. He decided to make a pair of spectacles made of ice for Li Tai in the shortest amount of time possible.
Soon, Pande came out of the kitchen with a large piece of transparent ice. "Your Majesty, most of the ice cubes in the palace are white. Only the water boiled by the kitchen yesterday froze last night. Only this piece of extremely transparent ice was left."
Moton nodded. Normal water would be white when frozen because there were many bubbles in the water. When the water froze, the bubbles would be sealed before they could escape. Boiling water, on the other hand, had already exhausted most of the air in the water. That was why it was crystal clear. It was the best tool for making concave lenses.
Meton exhaled. He first shaved the ice into thin pieces. Then, he rubbed his fingers back and forth on the ice cubes. Using the temperature of his fingers, he melted the center of the ice piece bit by bit.
Soon, a simple concave lens was formed in Meton's hands.
"Your Highness Emperor Wei, please take a look!" Meton passed the ice concave lens to Li Tai.
Li Tai took it curiously. Immediately, the cold ice cubes stimulated the pain in his hands. He ignored the bone-piercing cold and impatiently placed it in front of his eyes. Instantly, a clear image appeared in front of his eyes.
"I can actually see it clearly!" Li Tai stood up abruptly. He held the ice piece and looked into the distance like a child. He could see the withered branches fifty steps away moving with the wind. He could see everything clearly.
"Your Highness Emperor Wei, please look here!" Meton stood in front of the vision chart again and pointed at the last line.
"Down!"
"To the right!"
Li Tai answered smoothly. Everything was correct.
"Haha, Your Highness Emperor Wei's vision right now is comparable to an archer in the army." Meton laughed.
All the princes immediately clicked their tongues in wonder. Meton was actually able to use ice to instantly restore Li Tai's vision. It was simply a miraculous skill.
Li Tai was excited. Only when the ice cubes in his hands melted did he reluctantly put down the ice cubes in his hands. Meton's secret skill was indeed worthy of its reputation. Since Meton could use ice to make spectacles, then he could definitely make spectacles like reading glasses.
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