ブルーライト
Meaning: Blue light emitted from digital screens, believed to disrupt sleep and cause eye strain.
ブルーライト became a major health buzzword in Japan as awareness grew about the potential effects of screen-emitted blue light on sleep quality and eye health. The term drove a huge market for ブルーライトカットメガネ (blue light blocking glasses) and screen filters. While scientific consensus on its dangers is mixed, the term remains deeply embedded in everyday health conversations and product marketing in Japan.
Examples
- 寝る前のブルーライトが睡眠の質を下げるらしいよ。 据说睡前的蓝光会降低睡眠质量。Dicen que la luz azul antes de dormir reduce la calidad del sueño.자기 전 블루라이트가 수면의 질을 떨어뜨린다고 해.
- ブルーライトカットのメガネ買ったら目の疲れが減った気がする。 买了防蓝光眼镜后,感觉眼睛没那么累了。Me compré unas gafas con filtro de luz azul y me parece que se me cansan menos los ojos.블루라이트 차단 안경을 사고 나서 눈의 피로가 줄어든 것 같아.
- スマホのブルーライト設定、ナイトモードにしてる? 手机的蓝光设置,你开了夜间模式吗?¿Tienes activado el modo nocturno para la luz azul del móvil?스마트폰 블루라이트 설정, 야간 모드로 해놨어?
Pronunciation
/bu.ɾuː.ɾa.i.to/
Usage Guide
Context: health, daily conversation, product marketing
Tone: health-conscious, cautionary
✓ Do Say
- 寝る1時間前からブルーライト避けるようにしてる。 (I try to avoid blue light starting an hour before bed.)我尽量在睡前一小时开始避免蓝光。Intento evitar la luz azul a partir de una hora antes de acostarme.자기 1시간 전부터 블루라이트를 피하려고 해. (자기 1시간 전부터 블루라이트를 피하려고 하고 있어.)
- ブルーライトカットのフィルム貼った? (Did you put on a blue light filter?)你贴防蓝光膜了吗?¿Le has puesto el protector de luz azul a la pantalla?블루라이트 차단 필름 붙였어? (블루라이트 차단 필름 붙였어?)
✗ Don't Say
- 「ブルーライトで失明する」など過度に恐怖を煽る表現は避ける (Avoid fearmongering like 'blue light will make you go blind' — effects are debated and less severe than often claimed)避免'蓝光会导致失明'等过度恐慌的说法——蓝光的影响尚有争议,远没有常说的那么严重Evita expresiones alarmistas como «la luz azul te dejará ciego» — los efectos están en debate y son menos graves de lo que suele decirse.「블루라이트 때문에 실명한다」 등 지나치게 공포를 조장하는 표현은 피할 것 (블루라이트의 영향은 논란이 있고 흔히 주장되는 것보다 덜 심각하므로 '블루라이트로 실명한다' 같은 과장된 표현은 피하세요)
Common Mistakes
- Overstating the danger of blue light — while it can affect sleep, claims about severe eye damage are not well supported by current science
Origin & History
From English 'blue light.' Became a major health and lifestyle buzzword in Japan in the mid-2010s, driving a massive market for blue light filtering products.
Cultural Context
Era: Mid-2010s onward
Generation: All ages
Social background: Universal
Regional notes: Used across all of Japan. Japan is one of the largest markets for blue light blocking glasses, with major eyewear chains like JINS and Zoff promoting dedicated blue light cut lines.
More From This Topic
More from Health & Body
Flashcards, quizzes, audio pronunciation & spaced repetition — all free