Missing key

In the afternoon, old Avni Babu was sitting on the couch reading the newspaper. Suddenly, he remembered that he couldn't find the key to the medicine box. He lowered his glasses to the tip of his nose and searched the whole room, but he couldn't find it. Finally, his granddaughter Tuni came and sat under the sofa.When Tuni pointed out Grandpa's mistake, Avni Babu burst out laughing. Then he pulled Tuni closer and said, "You know what, Didibhai, as we grow older, we not only lose our eyesight, but sometimes we also lose our patience."