oculus

Noun
  1. The organ of sight (synset 105318579)
    domain usage: colloquialism - a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech
    is a type of: receptor, sense organ, sensory receptor - an organ having nerve endings (in the skin or viscera or eye or ear or nose or mouth) that respond to stimulation
    subtypes:
    • naked eye - the eye unaided by any optical instrument that alters the power of vision or alters the apparent size or distance of objects
    • peeper - an informal term referring to the eye
    • oculus dexter, od - the right eye
    • oculus sinister, os - the left eye
    • ocellus, simple eye, stemma - an eye having a single lens
    • compound eye - in insects and some crustaceans: composed of many light-sensitive elements each forming a portion of an image
    has:
    • choroid, choroid coat - a highly vascular membrane in the eye between the retina and the sclera; a dark pigmentation minimizes the scattering of light inside the eye
    • ciliary body - the part of the tunic of the eye between the choroid coat and the iris
    • eyelid, lid, palpebra - either of two folds of skin that can be moved to cover or open the eye
    • canthus - either of the corners of the eye where the upper and lower eyelids meet
    • epicanthic fold, epicanthus - a vertical fold of skin over the nasal canthus; typical for many east Asian peoples; sometimes occurs in Down's syndrome
    • nictitating membrane, third eyelid - a protective fold of skin in the eyes of reptiles and birds and some mammals
    • conjunctiva - a transparent lubricating mucous membrane that covers the eyeball and the under surface of the eyelid
    • eyeball, orb - the ball-shaped capsule containing the vertebrate eye
    • eye muscle, ocular muscle - one of the small muscles of the eye that serve to rotate the eyeball
    • cornea - the transparent dome-shaped anterior portion of the outer covering of the eye; it covers the iris and pupil and is continuous with the sclera
    • uvea - the part of the eye that contains the iris and ciliary body and choroid
    • uveoscleral pathway - a tubule that drains excess aqueous humor
    • iris - muscular diaphragm that controls the size of the pupil which in turn controls the amount of light that enters the eye; it forms the colored portion of the eye
    • crystalline lens, lens, lens of the eye - biconvex transparent body situated behind the iris in the eye; its role (along with the cornea) is to focus light on the retina
    • arteria centralis retinae, central artery of the retina - a branch of the ophthalmic artery; enters the eyeball with the optic nerve
    • arteria ciliaris, ciliary artery - one of several arteries supplying the choroid coat of the eye
    • arteria lacrimalis, lacrimal artery - an artery that originates from the ophthalmic artery and supplies the lacrimal gland and rectal eye muscles and the upper eyelid and the forehead
    • lacrimal vein, vena lacrimalis - drains the lacrimal gland; empties into the superior ophthalmic vein
    • lacrimal apparatus - the structures that secrete and drain tears from the eye
    • retina - the innermost light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nerve
    • sclera, sclerotic coat - the whitish fibrous membrane (albuginea) that with the cornea forms the outer covering and protection of the eyeball
    • musculus sphincter pupillae, pupillary sphincter - a ring of smooth muscle surrounding the iris
    • aperture - a natural opening in something
    is a part of:
    • visual system - the sensory system for vision
    • face, human face - the front of the human head from the forehead to the chin and ear to ear
    same as: eye, optic

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