◆ Humanized detail design ◆ Comfortable operation and smooth measurement ◆ Adjustable LCD screen for convenient measurement Hartmann's Principle Display: 8-inch TFT touch screen (adjustable viewing angle) High-speed image acquisition system, advanced image processing and analysis Automatic eye tracking for lifting, automatic measurement Corneal apex distance: 0.0, 12.0, 13.75, 15.0 Spherical mirror degree: -20.00D ~ + 20.00D (VD = 12mm, 0.01, 0.06, 0.12, 0.25 units) Corneal apex distance: 0.0, 12.0, 13.75, 15.0 Cylindrical power: 0.00D ~ + 10.00D (0.06, 0.12, 0.25 units) Cornea curvature radius: 5.0 ~ 10.0mm (0.01mm accuracy) Cornea diopter: 33.00D ~ 67.0D (when the corneal equivalent diopter is 1.3375)