Anatomy of the human eye


Vista Alpina 

Eye Center

Bahnhofplatz 1a
3930 Visp

Phone 027 946 70 00

Fax 027 946 70 03

Send an e-mail



Monday - Friday:

8am - 12pm

1pm - 7.30pm

(On Tuesdays, Wednesdays and

Fridays until 6pm)

On Saturdays:

8am - 12pm


by phone


Vista Alpina

Eye Center

Rue du Bourg 3
3960 Sierre

Phone 027 455 34 04

Fax 027 455 34 77

Send an e-mail



Monday, Wednesday, Friday:

8am - 12pm

12.30pm - 5pm

(Monday 12.45pm)


7am - 12pm

12.45pm - 7pm


8am - 12pm

12.45pm - 5.30pm

Saturday: closed


by phone

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).


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.


Vitreous body

The vitreous body is the clear gelatinous substance, which fills the back of the eyeball. The vitreous body takes up about two-thirds of the eyeball and helps it retain its shape.


Aqueous humour

This is a thin, watery substance, which takes up the front part of the eye between the lens and the cornea. It is continuously produced by the ciliary body and supplies the lens and the cornea.



The macula is the small centre in the retina responsible for sharp central vision.

Eye anatomy, Vista Alpina Eye Center Visp, Sierre, Valais


The retina covers two-thirds of the back of the eye. It is responsible for sending impressions from the optical system to the brain through the optic nerve as electric impulses.


Optic nerve

A bundle of nerve fibres, which transmits vision impulses from the retina to the brain.


Augenzentrum Vista Alpina AG and the services provided by Augenzentrum Vista Alpina are not legally or otherwise affiliated with Vista Klinik AG, Laser Vista AG, Vista Klinik Net AG or Vista Diagnostics AG.

SIWF-ISFM certificate ophthalmo surgery Vista Alpina Eye Center
Hospital certificate Vista Alpina Eye Center

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