Pathological fear of the dark, an abnormal and
persistent dread of the dark. Sufferers experience anxiety even
though they may rationally realize that the dark does not pose a
threat commensurate with their fear.
Formed from the Greek "nyx" (night) and the Greek "phobos"
(fear). "Nyx" has also contributed to other medical terms such
as "nyctalopia" (night blindness) and "nyctanopia" (impaired vision
in dim light and in
the dark). Another term for fear of the dark is scotophobia.
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