... small, light, compatible 4.fast delivery time ophthalmic A/B scan #CAS-2000B: Main configuration:USB 2.0 compatible,Ultrasonic ... 0.05mm Resolution: Vertical <0.2mm, Lateral <0.5mmMeasure: ACD, Lens, Vitrous, Axial length, and its averageDISPLAY mode: B, B+B ... calculation: Holladay, Hoffer-Q, SCDK, SRK-II, SRK/T, HaigisB-Scan model: 60 degree mechanic sector scanDetect Depth>=50mmImage storge: 10 ...