Human eye

mammalian eye; part of the visual organ of the human body

eyes gazing into other eyes

A wink is a facial expression made by briefly closing one eye. A wink is an informal mode of non-verbal communication usually signaling shared hidden knowledge or intent. However, it is ambiguous by itself and highly dependent upon additional context, without which a wink could become misinterpreted or even nonsensical. For example, in some regions of the world, a wink may be considered rude or offensive. Depending on the relationship of the people involved, a wink could possibly constitute a sexual gesture.

measuring the point of gaze or motion of an eye relative to the head

alt=Akanbē is a Japanese facial gesture performed by pulling down the lower eyelid to reveal the reddish underside of the eye, often accompanied by sticking out the tongue|thumb|233x233px|A man making the gesture

thumb|Emoji illustrating eye-rolling Eye-rolling is a gesture in which a person briefly turns their eyes upward, often in an arcing motion from one side to the other. In the Anglosphere, it has been identified as a passive-aggressive response to an undesirable situation or person. The gesture is used to disagree or dismiss or express contempt for the targeted person without physical contact.

thumb|right|300px|Simulated stages of a greyout. A greyout is a transient loss of vision characterized by a perceived dimming of light and color, sometimes accompanied by a loss of peripheral vision. It is a precursor to fainting or a blackout and is caused by hypoxia (low brain oxygen level), often due to a loss of blood pressure.

cosmetic contact lense

condition of pain in a lost eye

Sacs that protude from the embryonic forebrain to form the eyes