A scan probe: 10MHz import small size probe, built-in luminotron Measuring range: 15mm-40mm Measurement precision: ±0. 05mm; with macula lutea trace function Measurement: Anterior chamber depth, lens thickness, vitreous body length, total length and average Method of measurement: immersion and contact Eye mode: Phakic/ Aphakic/Dense/ various IOL IOL formula：SRK-II、SRK-T、BINKHORST- Ⅱ、HOLLADAY、HOFFER-Q、 HAIGIS Enter the name & ID; easy to check archive Storage: 10 cases, 5 readings each case Output: A scan waveform and IOL calculation sheet P scan probe: 20MHZ, angle of 45 degrees makes easier operation Resolution: 5um Measuring range: 150um~1500um Display: SINGLE mode and MAP mode Can display ultrasound waveform when measuring Each group is the average of 20 measurements Switch between IOP measured value and actual value Can input name, ID and operator’s name Others: Large color liquid-crystal screen Touch screen input, easy operation Curve freezing: Manual/Auto mode, controlled by pedal Built-in speed thermal printer