Keratometer - KM-99FeaturesCoincidence Focusing System15 x EyepiecesCircular LED Light SystemOne Position Instrument. Measure Both Meridians Without Changing Optical SystemSimple Vertical Adjustable Head To Fit PatientAstigmatic Axis 0 to 180 DegreeDual Eye Level Sighting SystemDioptre 36 - 52 (in 0.25 steps)Paint Finish : Black The Achromatic Optical Systems to Precise Measurement Of The Corneal Radius Curvature And Accurate Measurement Of Radius Curvature Of Contact LensStandard AccessoriesDust Cover