night-sight has definitions from the fields of physiology,ophthalmology
1
[ noun ] (physiology,ophthalmology) the ability to see in reduced illumination (as in moonlight)

Used in print

(Robert Heinlein, Stranger in a Strange Land....)

Jubal said that his night-sight probably came from the conditions in which he had grown_up , and Mike grokked this was true but grokked that there was more to_it ; his foster_parents had taught him to see .

Related terms

sight

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