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Anatomy of the human eye

The human eye is a complex organ about 1.7 cm in diameter in newborns and 2.3 cm in adults.



The cornea is the transparent front of the eye covering the iris and the pupil. It is responsible for the main part of the eye’s optical refraction power.


The circular opening in the middle of the iris controls the amount of light entering the eye by reducing (in bright light) or enlarging (in low light).

anatomy of the eye, cornea, pupil, iris, lens macula, optic nerve, vitreous body, vista alpina eye clinic, visp, sierre, sion, eye surgery,
Einzelnes Auge einer Frau
Ärztin Marina

"From the Waterkant (= coast) to the Valais - since opening of the Eye

Center in 2008 with plenty of

passion in charge of you."

"From the Waterkant (= coast) to the Valais - since opening of the Eye

Center in 2008 with plenty of

passion in charge of you."

"Eyes are well known

to be the mirror of

your soul. They often

serve to diagnose

further physical


Dr. Marina Maslennikova MD


The iris is the coloured part of the eye surrounding the pupil. It allows the pupil to reduce or enlarge depending on the brightness by expanding or contracting.


The transparent lens of the eye curved on both sides (biconvex) helps bundle the incidence of light rays on the retina, to allow for sharp vision.

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