olemus
silmaava

ISO/IEC 19794-6:
optiline avaus silma keskmes, toimib muutuva valgusavana
ja määrab iirise sisepiiri
= optical opening in the centre of the eye that serves as a variable light aperture and defines the inner boundary of the iris

piltllikult
https://pmgbiology.files.wordpress.com/2014/05/pupil-iris.jpg

https://duckduckgo.com/?q=pupil&t=h_&iax=images&ia=images

ülevaateid
https://en.wikipedia.org/wiki/Pupil

vt ka
- pupilli kese