She quietly closed her eyes.

Literal

She [topic-は] quietly eyes [object-を] closed.

目を閉じる (めをとじる) means 'to close one's eyes' — 閉じる is specifically 'to close/shut.' 静かに (quietly) sets the atmosphere: this isn't a reflexive blink but a deliberate, peaceful act. The sentence reads like a narrative moment — someone settling into meditation, falling asleep, or receiving news with composure.