... ≥ 50mm Probe: 10MHz Resolution: Vertical≤ 0.2mm Lateral≤ 0.5mm Gray Scale: Levels 256 Display Mode: B, B+B, B+A Image Storage: 10Frames Image Post Processing ... : Brightess, Comparison, Smooth, Sharp, Gray, Stretch, Equalize, etc( Ophthalmic A/B scan , ophthalmic equipments,usb2.0 compatible ...