LCD Eye Chart 21.5 Inch LCD Eye Chart Visual Acuity Vision Display Multifunctional Vision Screen Digital Visual Testing Chart Screen pitch: 0.284mm screen ratio: 16:9 screen size: 21.5 inch Visual Angel: H:170/M:160 color: 16.7M Maximum Brightness: 300cd/m Using distance: 1M-6M adjustable Adjustable vision recording method: decimal, imperial fraction recording method Remote control distance: the maximum remote distance is not less than 8m Screen: horizontal/vertical/single character Standard test graphics: E-shaped visual acuity chart/C-shaped visual acuity chart/Letter visual acuity chart, children’s visual acuity chart/red-green colour blindness test chart/WCTH four-point visual acuity digital visual acuity chart/Test Graph crossed visual acuity chart/contrast sensitivity test chart red-green visual acuity Standard/honeycomb sight mark/Maltens rod sight mark/astigmatism disc sight mark, etc. Overall machine weight: 3.4kg Size: 520(L)x105(W)x355(H)mm