expression, godan verb (-ru)
to lose hope; to feel despair; to see one's future go dark
Idiomatic expression literally meaning 'it becomes dark before one's eyes', used when one feels hopeless or sees no way forward. Often used in situations of sudden shock, disappointment, or despair.
See also: 目の前が真っ暗になる
不合格の通知を見て、目の前が暗くなった。
When I saw the rejection notice, I felt my future go dark.
彼女に振られて、目の前が真っ暗になった。
After she dumped me, everything went black before my eyes.