AGS<3 beginning AGS ≥ 3 advanced %
total 36 13 100
no progression 24 8 65.3
progression 12 5 34.7
% 73.5 26.5  
Table 1: Distribution of NTG patients according to qualitative perimetric results (Aulhorn glaucoma stages AGS); beginning (AGS<3) and advanced stages (AGS≥3); progressive and nonprogressive disease (n).