We offer spa-100 ophthalmic a-scan/pachymeter with macular recognition function, can accurately measure axial length, anterior chamber depth, lens thickness, as well as intra-ocular lens calculation. and also with the central area and the peripheral areas gain automatic compensation capability, accurate measurement of central and peripheral corneal thickness, is widely used in the preoperative examination and postoperative effect evaluation of refractive surgery. a scan probe: 10mhz import small size probe, built-in luminotronmeasuring range: 15mm-40mmmeasurement precision: 0. 05mm; with macula lutea trace functionmeasurement: anterior chamber depth, lens thickness, vitreous body length, total length and averagemethod of measurement: immersion and contacteye mode: phakic/ aphakic/dense/ various ioliol formulasrk-iisrk-tbinkhorst- holladayhoffer-q haigisenter the name & id; easy to check archivestorage: 10 cases, 5 readings each caseoutput: a scan waveform and iol calculation sheet p scan probe: 20mhz, angle of 45 degrees makes easier operationresolution: 5um measuring range: 150um1500umdisplay: single mode and map modecan display ultrasound waveform when measuringeach group is the average of 20 measurementsswitch between iop measured value and actual valuecan input name, id and operators name others:large color liquid-crystal screentouch screen input, easy operationcurve freezing: manual/auto mode, controlled by pedalbuilt-in speed thermal printer