Sharp edge of a reflex arc lamp indicator and band can make reading very clear, to avoid the visual errors.
一个有锋利边缘的指示器和带反射弧光灯能够使读数非常清楚，能够避免视觉误差。
2
Methods 1026 patients with craniocerebral trauma were observed pupil change and light reflex those who were wake were tested visual acuity and the visual field.