黑內障,黑朦
Amaurosis \Am`au*ro"sis\, n. [Gr. ?, fr. ? dark, dim.] (Med.) A loss or decay of sight, from loss of power in the optic nerve, without any perceptible external change in the eye; -- called also {gutta serena}, the ``{drop serene}'' of Milton.
amaurosis n : partial or total loss of sight without pathology of the eye; caused by disease of optic nerve or retina or brain