I see alot of people talking about work, and not telling your HR, Supervisor, etc. I know it isnt easy at ALL to even talk about this issue we face as they dont see a "Physical" problem, but keep in mind that if they dont know, and your performance slips, they can fire you for the lack of performance, whereas if they know, while they can still fire you, you have a better legal leg to stand on because of the disability. I know some countries have certain laws, but I just dont want to see anyone lose their job over things they cant control.