Keratometer - KM-99 Features » Coincidence Focusing System » 15 x Eyepieces » Circular LED Light System » One Position Instrument. Measure Both Meridians Without Changing Optical System » Simple Vertical Adjustable Head To Fit Patient » Astigmatic Axis 0 to 180 Degree » Dual Eye Level Sighting System » Dioptre 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 Lens Standard Accessories » Dust Cover