Eyes

• aqueous humor

  /ˈækwiəs ˈhjuːmər/ (noun)
  A transparent, watery fluid found between the lens and the cornea of the eye.

• astigmatism

  /əˈstɪɡməˌtɪzəm/ (noun)
  A defect in the eye or in a lens caused by a deviation from spherical curvature, resulting in distorted images.

• baby blues

  /ˈbeɪbi bluz/ (noun)
  A term colloquially used to refer to blue-colored eyes in infants.

• blind spot

  /blaɪnd spɒt/ (noun)
  The point of entry of the optic nerve on the retina, insensitive to light.

• cataract

  /ˈkætərækt/ (noun)
  A medical condition in which the lens of the eye becomes progressively opaque, resulting in blurred vision.

• color blindness

  /ˈkʌlər ˈblaɪndnɪs/ (noun)
  The inability to perceive colors in a normal way.

• cones

  /koʊnz/ (noun)
  Photoreceptor cells in the retina of the eye that are responsible for color vision.

• conjunctivitis

  /kənˌdʒʌŋktəˈvaɪtɪs/ (noun)
  Inflammation or infection of the outer membrane of the eyeball and the inner eyelid.

• cornea

  /ˈkɔːrniə/ (noun)
  The transparent front part of the eye that covers the iris, pupil, and anterior chamber.

• crocodile tears

  /ˈkrɒkədaɪl tɪərz/ (noun)
  Tears or expressions of sorrow that are insincere.

• cross-eyed

  /ˈkrɔs aɪd/ (adjective)
  Having eyes that look in different directions.

• detached retina

  /dɪˈtætʃt ˈrɛtɪnə/ (noun)
  A condition where the retina peels away from its underlying layer of support tissue.

• ectropion

  /ɛkˈtroʊpiən/ (noun)
  A condition in which the lower eyelid turns outward and does not touch the eye.

• entropion

  /ɛnˈtroʊpiən/ (noun)
  A medical condition in which the eyelid folds inward.

• esotropia

  /ˌɛsoʊˈtroʊpiə/ (noun)
  A form of strabismus where one or both of the eyes turn inward.

• exophthalmos

  /ˌɛksɒfˈθælmɒs/ (noun)
  Abnormal protrusion of the eyeball.

• exotropia

  /ˌɛksəˈtroʊpiə/ (noun)
  A form of strabismus where one or both of the eyes turn outward.

• eye

  /aɪ/ (noun)
  The organ of sight, in humans spherical in shape and set in a bony socket in the skull.

• eye socket

  /aɪ ˈsɒkɪt/ (noun)
  The bony cavity in the skull containing the eyeball.

• eyeball

  /ˈaɪˌbɔl/ (noun)
  The globe-shaped part of the eye of a vertebrate, within the eyelids and socket.

• eyebrow

  /ˈaɪbraʊ/ (noun)
  The strip of hair growing on the ridge above a person's eye socket.

• eyelash

  /ˈaɪlæʃ/ (noun)
  One of the short curved hairs growing on the edges of the eyelids, serving to protect the eyes.

• eyelid

  /ˈaɪlɪd/ (noun)
  Each of the upper and lower folds of skin which cover the eye when closed.

• floater

  /ˈfloʊtər/ (noun)
  One or more spots or threads seen moving through the visual field, caused by particles within the fluid of the eye.

• glaucoma

  /ɡlɔːˈkoʊmə/ (noun)
  A condition of increased pressure within the eyeball, causing gradual loss of sight.

• iris

  /ˈaɪrɪs/ (noun)
  The colored part of the eye that controls the size of the pupil and the amount of light reaching the retina.

• lazy eye

  /ˈleɪzi aɪ/ (noun)
  A condition in which one eye does not develop normal sight, often leading to the other eye becoming dominant.

• myopia

  /maɪˈoʊpiə/ (noun)
  A condition in which close objects appear clearly, but far ones don't.

• optic nerve

  /ˈɒptɪk nɜːrv/ (noun)
  The nerve that transmits visual information from the retina to the brain.

• peeper

  /ˈpiːpər/ (noun)
  Informal term for an eye or for small, chirping frogs.

• pinkeye

  /ˈpɪŋkˌaɪ/ (noun)
  An inflammation of the conjunctiva of the eye, causing it to become red.

• pupil

  /ˈpjuːpəl/ (noun)
  The adjustable opening in the center of the eye through which light enters.

• retina

  /ˈrɛtɪnə/ (noun)
  A layer at the back of the eyeball containing cells that are sensitive to light and trigger nerve impulses that pass via the optic nerve to the brain.

• sclera

  /ˈsklɪrə/ (noun)
  The white outer layer of the eyeball, covering it except for the cornea.

• stye

  /staɪ/ (noun)
  A painful, red swelling on the edge of an eyelid, caused by an infected gland.

• twenty-twenty

  /ˈtwɛnti ˈtwɛnti/ (adjective)
  Denoting normal visual acuity measured at a distance of twenty feet.

• walleye

  /ˈwɔːlaɪ/ (noun)
  A condition in which there is a nonparallelism of the visual axes, causing a person to look in different directions.