Shortly after he was expelled from the Stanton Institute of Technology, Hoard Roark has the following encounter with Mrs. Keating:
He stood looking at her. She knew that he did not see her. No, she thought, it was not that exactly. He always looked straight at people and his damnable eyes never missed a thing, it was only that he made people feel as if they did not exist.
Later, in his interaction with the Dean, the Dean had a similar feeling.
Why was that? None of the characters in Atlas Shrugged, We the Living, or Anthem were described like that (even major heroic figures like John Galt). Why was Roark in particular described like that?