Eye
In anatomy, the eye was the organ for eyesight. Most humanoids had two placed evenly in sockets of the skull. Some species had more eyes though, like Trag'tok's species, and an unnamed being at Kukulkan's zoo.

All Denobulans had blue-colored eyes. ()

Among Humans, to "see the look in the eyes" was a common phrase meaning to see emotions expressed in them. ()

A diagram of the Human eye depicting the location of eye parts was stored in the 's library computer database. This database was accessed by the Talosians in 2254. ()

All Betazoids had black-colored irises. (; )

The drawing "" by  depicts a one-eyed alien making first contact with a Human in an environmental suit. ()

In 2364, the Aldeans' eyes were very sensitive to bright light due to chromosomal damage. ()

When the anaphasic lifeform Ronin was bonded to a Human, the host's eyes turned green. ()

When hasperat was made correctly, it caused the eyes to water. ()

Martok lost one of his eyes in a fight with Ikat'ika during his two-year confinement at the Dominion's Internment Camp 371. ()

Beverly Crusher felt that Data had nicer eyes than B-4. ()

The loss of eyesight was known as blindness.

Sometimes, when an eye was lost or damaged, one might have elected to wear an eyepatch to cover it. (; ; )

Elim Garak once got a confession out of Doctor Parmak simply by staring at him for four hours. Afterwards, he kept saying "His eyes, his eyes." ()

Examples of eyes

Anatomy of the eye 

Inner eyelid
Iris
Optic nerve
pupil
Retina
Tear duct
Elasian tears

Functions

Blinking
Eye contact
Hand-eye coordination
REM sleep
Staring
Tear
Winking
Visual acuity

Medical conditions

Blindness
Double vision
Myopia
Vision loss

Technologies and procedures

Eyepatch
Eyepiece
Glasses
Sunglasses
Ocular implant
Ocular node
Retinal imaging scan
Robbiani dermal-optic test
Visor
VISOR

See also 

Electric eye
Nervous system
Visual cortex

External link

de:Auge
Organs