Refractor (with / without LED)High-precision lenses and wider measuring range (-32D to +33D). The main body is 24% smaller than conventional model which allows for easier viewing of the patient. Hand-held remote control. Remote control unit offers individual keys for control of both refractor and charts. Using chart keys enables direct control of chart system. Hand-held wireless remote control unit enables control of RV-II from 8 meters away, allowing operator to point directly to chart contents. Touch type table control unit. Can be used with both types of refractor or in combination with hand-held remote control unit.