Visual impairment causing fall? (8)
I believe the answer is:
cataract
I believe this is a double definition.
'visual impairment' is the first definition.
(I've seen this before)
'fall?' is the second definition.
(I've seen this before)
'causing' acts as a link.
(Other definitions for cataract that I've seen before include "might affect one's view of things" , "one may have causing blurred vision" , "Waterfall which might be seen in the eye" , "Flood" , "Waterfall or eye ailment" .)