RNIB Scotland hustings event to be held in Glasgow.
Blind and partially sighted voters still struggle to cast their ballot papers in secret.
A Glasgow escape room company, Riddle Rooms - where teams of friends or work-colleagues must find ways to get out of a locked room in total darkness - is donating part of its proceeds to a sight loss charity.
People will be urged to get their eyes examined during National Eye Health Week.
US news network will film their experience, to be broadcast across all 50 states.