EY, Ey, or ey may refer to:
Eye color is a polygenic phenotypic character determined by two distinct factors: the pigmentation of the eye's iris and the frequency-dependence of the scattering of light by the turbid medium in the stroma of the iris.
Eyes are organs of the visual system. They provide organisms vision, the ability to process visual detail, as well as enabling several photo response functions that are independent of vision.
Eyes Wide Shut is a 1999 erotic drama film directed, produced, and co-written by Stanley Kubrick. Based on Arthur Schnitzler's 1926 novella Traumnovelle (Dream Story), the story is transferred from early 20th century Vienna to 1990s New York City.
An eyepiece, or ocular lens, is a type of lens that is attached to a variety of optical devices such as telescopes and microscopes.
"An eye for an eye", or the law of retaliation, is the principle that a person who has injured another person is to be penalized to a similar degree, or in softer interpretations, the victim receives the [estimated] value of the injury in compensation.
The eye is a region of mostly calm weather at the center of strong tropical cyclones. The eye of a storm is a roughly circular area, typically 30–65 km (20–40 miles) in diameter.
Eye tracking is the process of measuring either the point of gaze (where one is looking) or the motion of an eye relative to the head.
Eye movement includes the voluntary or involuntary movement of the eyes, helping in acquiring, fixating and tracking visual stimuli.
Eyeshield 21 (Japanese: アイシールド21, Hepburn: Aishīrudo Nijūichi) is a Japanese manga series written by Riichiro Inagaki and illustrated by Yusuke Murata.