Measured vertical diameter of optic disc
SmallMediumLarge
Disc area <1.6 mm2 1.6 to 2.8 mm2 >2.8 mm2
Volk 60 D<1.65 mm1.65 to 2.2 mm>2.2 mm
78 D<1.3 mm1.3 to 1.75 mm>1.75 mm
90 D<1.1 mm1.1 to 1.45 mm>1.45 mm
Superfield<1.15 mm1.15 to 1.50 mm>1.5 mm
Digital 1.0x<1.5 mm1.5 to 1.95 mm>1.95 mm
Super 66<1.45 mm1.45 to 1.9 mm>1.9 mm
Nikon 60 D<1.45 mm1.45 to 1.9 mm>1.9 mm
90 D<0.95 mm0.95 to 1.25 mm>1.25 mm
Haag-Streit Goldmann<1.3 mm1.3 to 1.7 mm>1.7 mm