Not everyone. That exam is required in case your medical information isn't clear enough to us to decide about your claim.
But if i have, well you know, enough information about my condition, I won't be required to do the exam, right?
That's correct. In case, your medical profile has enough information, the exam won't be necessary on any instance. That's why your medical information must be as complete as possible.
I'm sure i won't need that, but it's good to know what it is. Could you tell me about its ultimate purpose?