When did your child receive this treatment for doctor reported vision problem:TmStp:Pt:^Patient:Qn:PhenX
when did your child receive this treatment for doctor reported vision problem:tmstp:pt:^patient:qn:phenx
When did your child receive this treatment for doctor reported vision problem:Time Stamp-Date and Time:To identify measures at a point in time:^Patient:Quantitative:PhenX
when did your child receive this treatment for doctor reported vision problem:time stamp-date and time:to identify measures at a point in time:^patient:quantitative:phenx