ophthalmic A/B scanner: 1.integrated track 2.new system Window 7 or ... Window XP 3.USB2.0 compatible 4.very high quality CE FDA ophthalmic A ... 256including A/B scanner, printer, computer, new System Window 7 or Window XP, integrated track...... Technical specification:A-SCANB ... Vitrous, Axial lengthDISPLAY mode: B, B+B, B+A mode,IoL Calculation: Holladay, Hoffer-Q, SCDK, SRK ...