NATA class of test 1.56.02
ORLAB is NATA accredited for calibration of focimeters.
with least uncertainties of measurement of-
0.01 m⁻¹ in refractive power in the range -0.25 to +0.25 m-1
0.015 m⁻¹ in refractive power in the range -25 to +25 m-1
0.01 cm.m⁻¹ in prismatic power to 20 cm.m-1
1° in axis
Based on reference lenses calibrated by the National Measurement Institute, Australia and the National Physical Laboratory, UK.