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# cornea

«cornea» in Mova's school dictionary: **The clear, curved, dome-shaped layer at the front of the…** — its meaning for a pupil, its sense in the lessons and examples.

### part of speech

noun (a cornea, corneas)

### meaning for a pupil

The clear, curved, dome-shaped layer at the front of the eye that covers the iris and pupil and helps focus light. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/cornea/#m1)

### sense in the lessons

In science lessons on the eye and seeing, pupils label the parts: cornea, iris, pupil, lens, retina, optic nerve. The cornea bends light first, then the lens finishes focusing it on the retina. In health and safety, goggles protect the cornea from chemicals and flying bits; a scratch on the cornea hurts a lot. Some people receive a donated cornea in a transplant. Phrases: «a scratched cornea», «corneal transplant».

### examples

- Light passes through the cornea before it reaches the lens. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/cornea/#x1)
- We labelled the cornea on our diagram of the eye. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/cornea/#x2)
- Wear goggles to protect your cornea in the lab. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/cornea/#x3)
- The doctor said I had a tiny scratch on my cornea. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/cornea/#x4)
- The cornea has no blood vessels, so it is clear. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/cornea/#x5)
- A cornea transplant can help some people see again. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/cornea/#x6)

### note

Said «KOR-nee-uh». Plural: corneas. The adjective is «corneal». Do not confuse the cornea (clear front window) with the iris (the coloured part) or the retina (at the back, where light is sensed).

### Trees and pragmatics

[Every meaning and example of «cornea» parsed by Mova](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/cornea/), each sentence with its dependency tree and frames.