In the railway carriage one boy was laughing all the time, when he was looking at the window. The man sitting in from of him was getting angry. He was very tired and he wanted to sleep. But the boy was laughing all the time and prevented him. The man could not stand it and said: — Mister, could you tell something to your son. Calm him down. The father didn’t say a word. Then man said again: — I think, your son needs a doctor! His behavior is awful! — We have just been there. – smiled a father. The man surprised. Father continued: — My son started to see the world around him! His vision has been restored today