Error of background brightness
Light spot
Diameter is 2mm +/- 0.25mm Eye position tracking
When blinking, the system will alarm automatically Window of eye-position tracking
White-black CCD, directly tracking the testing eye stimulating retention time
0.2s--2.0s, the program can adjust (±5%) stimulating spacing interval
0.5s --2.0s, the program can adjust (±5%)