blue light filter
- noun
- /blu laɪt ˈfɪltər/
- Specialized
:
filtro de luz azul
- Do you use a blue light filter on your laptop?
Examples
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She activated the blue light filter on her smartphone to reduce eye strain at night.
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Some people buy special glasses that act as a blue light filter while working on their computer.
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Many laptops now come with a built-in blue light filter option for users.
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I installed a blue light filter on my phone.
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Using a blue light filter on your device can help reduce eye strain during late-night reading.
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Many smartphones include a blue light filter feature to improve sleep quality by limiting blue light exposure before bed.
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To protect your eyes, consider enabling the blue light filter while working on the computer for long periods.
Synonyms
1
4.3
A piece of clear material, like a camera lens, that reduces light passing through it
A screen setting or tool that reduces blue light from phones and computers to help your eyes and sleep
How Blue-Blocking
- Specialized
Surface Forms
Morphology
The phrase is fully compositional: 'blue' modifies 'light' to indicate light of short (blue) wavelengths and 'filter' denotes a device that reduces or blocks certain frequencies, so a learner who knows those words can infer it is a device or setting that reduces blue light from screens. This noun-noun + noun construction is common cross-linguistically and follows standard English compounding patterns, making it immediately understandable to a B1 learner.
Etymology
Blue light filter comes from the idea of a screen or glass that filters the blue part of the light from your phone or computer, like putting on warm sunglasses that take away the blue colour. So, a blue light filter 'reduces eye strain' and can 'help you sleep' by cutting that blue light.