OPTIC DISK

Pronunciation (US):

(GB):

IPA (US):

 Dictionary entry overview: What does optic disk mean? 

• OPTIC DISK (noun)
  The noun OPTIC DISK has 1 sense:

1. the point where the optic nerve enters the retina; not sensitive to light

  Familiarity information: OPTIC DISK used as a noun is very rare.

 Dictionary entry details 

• OPTIC DISK (noun)

Sense 1

Meaning:

The point where the optic nerve enters the retina; not sensitive to light

Classified under:

Nouns denoting body parts

Synonyms:

blind spot; optic disc; optic disk

Hypernyms ("optic disk" is a kind of...):

point (the precise location of something; a spatially limited location)

Holonyms ("optic disk" is a part of...):

retina (the innermost light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nerve)

 Context examples 

Atrophy of the optic disk which may be congenital or acquired.

(Optic Atrophy, NLM, Medical Subject Headings)

Swelling around the optic disk, the area where the optic nerve (the nerve that carries messages from the eye to the brain) enters the eyeball.

(Papilledema, NCI Dictionary)

A benign melanocytic proliferation within or adjacent to the optic disk.

(Melanocytoma of the Eyeball, NCI Thesaurus)

Retinopathy associated with diabetes mellitus, which may be of the background type, progressively characterized by microaneurysms, interretinal punctuate macular edema, or of the proliferative type, characterized by neovascularization of the retina and optic disk, which may project into the vitreous, proliferation of fibrous tissue, vitreous hemorrhage, and retinal detachment.

(Diabetic Retinopathy, NLM, Medical Subject Headings)

The consequences of the increased pressure may be manifested in a variety of symptoms, depending upon type and severity, such as excavation of the optic disk, hardness of the eyeball, corneal anesthesia, reduced visual acuity, seeing of colored halos around lights, disturbed dark adaptation, visual field defects, and headaches.

(Glaucoma, NLM, Medical Subject Headings)