noun, noun which may take the genitive case particle 'no'
night blindness; nyctalopia
Medical and folk term for difficulty seeing in low light. Often used in the phrase 鳥目になる.
He has night blindness and can barely see once it gets dark.
If you develop night blindness, driving at night is dangerous.
bird's-eye view
Literally 'bird eye', from the observation that many birds have poor night vision. The exact historical origin is uncertain, but the term has been used in Japanese folk medicine for centuries.