noun
opera glasses
Small binoculars used in theaters, especially for opera or ballet performances.
オペラグラスで舞台の細かい表情を見る。
I use opera glasses to see the detailed expressions on stage.
Variant with interpunct; less common in everyday writing.
双眼鏡 is a general term for binoculars, while オペラグラス specifically refers to compact, low-magnification binoculars for theater use.
Loanword from English 'opera glasses'.