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# optical

«optical» in Mova's school dictionary: **To do with seeing and the eyes** — its meaning for a pupil, its sense in the lessons and examples.

### part of speech

adjective (optical); adverb (optically)

### meaning for a pupil

1) To do with seeing and the eyes. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/optical/#m1)

2) To do with light and how it travels, or with instruments that use light, such as lenses, microscopes and telescopes. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/optical/#m2)

### sense in the lessons

In science, «optical illusion» is a picture that tricks your eyes and brain; «optical fibre» carries light (and internet data) along thin glass threads. Opticians sell glasses. Phrases: «optical illusion», «optical fibre», «optical instrument», «optical mouse».

### examples

- The picture is an optical illusion: the two lines look different but are the same length. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/optical/#x1)
- Optical fibres carry internet signals as flashes of light. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/optical/#x2)
- A telescope is an optical instrument. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/optical/#x3)
- The optical mouse uses a tiny light to see movement. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/optical/#x4)
- Optical shops sell glasses and contact lenses. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/optical/#x5)
- The magician used optical tricks with mirrors. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/optical/#x6)

### note

Adjective. Related: optician (a person who tests eyes and sells glasses), optics (the science of light). UK spelling «optical fibre», US «optical fiber». Trap: «optical» is about sight and light, not «optional» (you can choose).

### Trees and pragmatics

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