Wow... I wasn't expecting tons of response... but I really appreciate all of them.
Unfortunately, as of the moment my web application is not geared for the visually impaired. It is only designed for a small audience that allows them to take exams via the web. Simply saying... my online exams wouldn't also work for the visually-impaired.
However what was brought up here is a situation that I never thought of... honestly. I find this to be a very valuable suggestion... and I'll do what I can to include this capability in the future.