Area: bad area is less than 0.2mm2, no obvious Visual, touch no touch (without causing color as the base), and with only one acceptable (AC), otherwise reject (RE)
A zone: poor area in less than 0.2mm2, visually obvious, touch no feeling (to not cause Harmonia basis), and the same side can only have one acceptable (AC), otherwise reject (RE)
A: bad area within 0.2mm2, visual not obvious, touch no handle (not to cause the heterochromatic as a benchmark), and one can only have one, acceptable (AC), otherwise reject (RE)