the naked eye
C2 If something can be seen with the naked eye, it can be seen without the help of an instrument:
This organism is too small to be seen with the naked eye.
The police found traces of blood on his jacket that were invisible to the naked eye.
Thesaurus: synonyms and related words
Eyesight, glasses & lenses
- (as) blind as a bat idiom
- 20/20 vision
- age-related macular degeneration
- AMD
- Balint's syndrome
- blepharospasm
- blind side
- blindly
- ciliary
- cross-eyed
- dispensing optician
- horn-rimmed
- lorgnette
- nearsighted
- ophthalmologist
- optic
- optometrist
- sightless
- spectacle
- twenty-twenty vision
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