The SJR-9900B Auto Refractometer delivers fast, accurate refraction and keratometry readings with an intuitive 7-inch color display and ergonomic one-hand control. Designed for busy optometry and ophthalmology clinics, it shortens measurement time while improving patient comfort. Customizable function modes (diopter step, vertex distance, cylinder mode, measuring mode) and automatic PD measurement streamline workflow and reporting. Built with quality materials and advanced image processing, the unit combines elegant design with clinical reliability.