... optional handheld auto Keratometer. With normal,vitreous body enhancement,retina observation mode,mainly used for diagnosis of intraocular diseases ... length,calculate diopter of implanted IOL as well.A scan:Probe:10MHz frequencies,with LEDPrecision:±0.06mmOutput:print ... Q,HAIGISEye modes:NORMAL/DENSE/APHAKIC/PMMA/SILICONE/ACRYLICB scan:Probe:10MHz frequencies,magnetic driven and noiselessScanning Mode: ...