Was Socrates blind?
Socrates was the teacher of Plato, who admired Socrates very much, while Socrates probably considered Plato as one of his favorite pupils. Plato wrote down from memory Socrates' "Dialogues". Aristotle was born several years after Socrates' death. He spent most of his life at Plato's Academy and so was indirectly much influenced by Socrates' philosophy. But he did not have any personal relationship with Socrates.
Our most important source of biographical information about Socrates is found in the dialogues of Plato, Socrates' student. Also valuable are the Memoirs of Socrates by Xenophon, a contemporary. Two other friends of Socrates also wrote about him. Finally, there is a comedic parody of Socrates in Aristophanes' play, The Clouds. Historians ascribe varying degrees of reliability to these accounts.