03:00 02:56 00:45 7" color and touch screen, high accuracy , with pd ph pcl ruler , blue light transmittance measure
00:29 9" color and touch screen, 3D tracking, full automatic ,
00:45 3D tracking , touch screen,
00:21 auto tracking, veritical tracking, motorized chinrest , one key lock , with keratometer , 8" color and touch screen
00:29 Full automatic auto refractometer , top quality in China
00:44 Full automatic , small size , with built-in computer