Ultrasonic A-B Scan for Ophthalmology. Ultrasonic A-B Scan for OphthalmologyDescriptionHIGH RESOLUTION IMAGESB, B+B, B+A, A FEATURES8 STEPS ZOOMPOST PROCESSINGREAL TIME CLOCKUSER FRIENDLY7'" CRT MONITORTURNUP KEYBOARD, ... chamber depth, lens thickness, vitreous length and axial lengthMeasuring method: Automatic (for normal, aphakic, pseudophakic, cataract)and manual10L power calculation: SRK ...