• Topcon is proud to introduce the new KR-800 Auto Kerato/Refractometer, which incorporates the very latest in design technology and ergonomics. The KR-800 features a bright, new 8.5 inch color touchscreen panel to control the main functions and an improved joystick operation due to a 23% reduction in weight from the previous models. Topcon systems have been renowned for their accuracy due to the proven Rotary Prism Technology. The new KR-800 features this technology as well, so you can take confidence that accurate and stable keratometric and refractive measurements will be the norm.