Shakespeare left London and stopped writing 'because he went blind'
Rick Thomas said he thought years of writing by candlelight would have left Shakespeare struggling to see.
He has just written a play, For All Time, about why the bard left London for Stratford-upon-Avon in 1613.
It is question has vexed scholars for years.
Thomas said he had came to the conclusion out of personal experience - that writing plays for years on end had taken its toll on his vision. With the conditions Shakespeare was working under, he thought his sight would have deteriorated much faster.