The last time I heard the question asked the answer was a resounding NO on safety grounds.
Thats precisely what the CAA said when asked if special arrangements could be made for someone who could not read the exam papers. Which was I think the topic at that point in the thread.
Any disability, perceived or actual, with which a prospective pilot is handicapped should surely be a matter for the medical department of the CAA concerned.
Indeed it is, however the final decision is based upon a recommendation from a pilot examiner who determines if the disability has any operational impact. In some cases a person can pass a medical but still have a potential problem i.e. a missing limb!