MANUAL REFRACTOMETER

TECHNICAL SPECIFICATIONS : Measurement range - Sphere: +16.75 D to -19.00 D (0.25 D steps) - Cylinder: 0 to +6.00 D (0.25 D steps) - Axis: 360° (5° steps) - Crossed cylinders: ± 0.25 D - Prism: 0 to 20 (steps of 1 ) - Pupil distance: 50 to 75 mm (steps of 1 mm) - Reading distance (VP): 12 to 70 mm - Additional filters and lenses: polarized red/green - Maddox horizontal and vertical - Cross-linked glass - Fixed cross cylinder ± 0.50 D OP18110