A new generation vision chart Including a wide range of test charts Precise test distance adjustment Specification LCD 15-inch XGA PanelDistance 2 M -7M (in steps of 0.5m)Remote control IRRemote control battery AAABrightness 160 cd/m2 (min) Optotype E, C, Letter, Number, ChildrenTest function Schober Test Worth Test EDTRS Cross Grid Coincidence Test Stereo Test Astigmatism Test Fixation point ...