It can be seen, then, that whiteness is directly determined through comparative oculareye, whereas brightness refers to comparative optical reflectance.
由此可见，白度是指肉眼直接观察的对比结果，而亮度则是指光学反射的对比结果。
2
This usually appears as one or more of three distinct syndromes: ocular (eye) disease (0.5-2% of patients), meningoencephalitis (less than 1%) or haemorrhagic fever (less than 1%).
Jolanta Stettler, 39, of Denver, was told she had less than six months to live after getting a diagnosis of ocular melanoma, a rare cancer of the eye that had spread to her liver.