ultrasound research history,bring for ophthalmology biometry.5.7'' color LED touch screen,more convenient for your operation. Immersion & contact methods,precise measurement. Built-in thermal printer,realize print anytime. I-station software enable massive storage ,report transmission and print. Sensitive , accurate measurement,show 10 groups with deviation meanwhile. With IOP(INTRAOCULAR PRESSURE)adjustment after get tonometer measurement results.