He has not played since and recently saw a specialist in Canada, but has reluctantly accepted that his career is over.
Wilkinson, 31, was struck at close range after coming on as a halftime substitute in a cup tie at Blackburn Rovers in February last year.
"Over a year on from the injury, there's still a lot going on," he told Sky.
He said that he was affected by vertigo and blurred vision whenever he trained.
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His contract with Stoke ended in the close season after he made almost 200 appearances for the club.
(Reporting by Steve Tongue; editing by Toby Davis)
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