PO N:Len:Pt:Corrective lens.left:Qn:Lensmeter
po n:len:pt:corrective lens.left:qn:lensmeter
PO N:Length:To identify measures at a point in time:Corrective lens.left:Quantitative:Lensmeter
po n:length:to identify measures at a point in time:corrective lens.left:quantitative:lensmeter