Orbit & optic nerve


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Last staff update: 18 May 2022

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PubMed Search: Glaucoma pathology

Nat Pernick, M.D.
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Cite this page: Pernick N. Glaucoma. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/eyeglaucomageneral.html. Accessed September 26th, 2023.
Definition / general
  • Diverse etiologies, causes widespread degeneration of ocular tissue
  • Defined as optic neuropathy with distinct excavation of optic nerve head and incremental loss of visual field sensitivity
  • Almost always due to increased intraocular pressure (due to impaired outflow of aqueous humor) which causes optic nerve damage and degenerative changes below
Normal circulation of aqueous humor
  • Aqueous humor is produced by pars plicata of ciliary body, discharged into posterior chamber, flows between lens and iris, through pupil, into anterior chamber, then through trabecular meshwork (in deep layers of peripheral cornea just in front of angle of anterior chamber), into Schlemm canal, leaves eye via plexus of intrascleral and episcleral veins along limbus

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Anterior chamber

Microscopic (histologic) images

AFIP images
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Iris and ciliary body with open anterior chamber angle

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