1.
naked eye; unaided eye; uncorrected vision
Seeing without glasses, contact lenses, or any optical aid. Used both in everyday contexts about vision correction and in scientific contexts about observation without instruments.
Composed of 裸 (naked, bare) + 眼 (eye). Literally means bare eyes — eyes without any optical aid.
Common collocations
- 裸眼視力 (uncorrected visual acuity)
- 裸眼で見える (visible to the naked eye)
- 裸眼で観察する (to observe with the naked eye)
- 裸眼で生活する (to go about daily life without glasses)
Similar words
- 肉眼 — naked eye; very similar but more commonly used in scientific contexts for observation without instruments
- 矯正視力 — corrected vision (with glasses/contacts); the opposite measurement
Usage
At eye exams in Japan, 裸眼視力 (uncorrected vision) is measured first, followed by 矯正視力 (corrected vision). Japan uses a decimal scale (e.g., 1.0, 0.5) rather than the Snellen fraction used in English-speaking countries.