Product Features NEW Auto Quick Measurement Fixation Intensity Adjustment - Automatically Lowered For Pupils Less Than 3 mm In Size Extended Diopter Adjustment Range Retro-Illumination Mode Perfect for Pediatrics and Wheelchair-Bound Patients Righton Retinomax Series 3 The Retinomax Series 3, the World’s Leading Handheld Refractor and Keratometer The Retinomax 3 Series boasts all the same benefits as the 2 Series, plus an impressive collection of new features. Lighter With Thinner Grip Weighing just under one kilogram, the main body with battery is over 17% lighter for the K-plus 3 and 11% lighter for the Retinomax 3 than the conventional Retinomax Series models. The Retinomax Series 3’s center of gravity is in the grip, making the Series 3 feel much more lighter and balanced. NEW Auto Quick Measurement If no measurement is made within six seconds, the unit automatically enters Quick mode. Measurement is then taken in 0.07 seconds. In Auto Quick mode, “AQ” appears on printouts.