Are you blind, or do you have serious difficulty seeing, even when wearing glasses:Find:Pt:^Patient:Ord
are you blind, or do you have serious difficulty seeing, even when wearing glasses:find:pt:^patient:ord
Are you blind, or do you have serious difficulty seeing, even when wearing glasses:Finding:To identify measures at a point in time:^Patient:Ordinal
are you blind, or do you have serious difficulty seeing, even when wearing glasses:finding:to identify measures at a point in time:^patient:ordinal