1、 Performance characteristics 1. 8, 10, 11 compatible designs: 2. Full Chinese operation interface, easy to learn and use; 3. A comprehensive report in all Chinese, with the option to choose the printing format+/- system or numerical system: 4. Adopting ultra-high brightness cold light source testing technology, the light source is permanently not changed. More accurate results; 5. Can input date and sample medical record number for easy query; 6. Having a single line test and a line test analysis mode; 7. Power off automatically saves all measurement data, allowing the operator to continue working.