Evaluating the cup and disc in glaucoma - EyeGuru
Glaucoma usually presents as optic disc cupping without pallor. This can help differentiate glaucoma from other ophthalmic pathologies that can change the color of the optic nerve. A normal optic disc has a pink-orange appearance with a pale center where the optic cup is.
Pearls for Correct Assessment of Optic Disc at Glaucoma Diagnosis
2017年11月1日 · It is critical to first correctly estimate the size of the optic disc when investigating for glaucoma. Measurement of optic disc size is best performed at the slit lamp using a narrow vertical light beam and a condensing fundus lens.
Primary Open-Angle Glaucoma - EyeWiki
Primary open-angle glaucoma (POAG) is a subset of the glaucomas defined by an open, normal appearing anterior chamber angle and raised intraocular pressure (IOP), with no other underlying disease. If there is an identifiable underlying cause for …
Glaucoma - StatPearls - NCBI Bookshelf - National Center for ...
2019年11月19日 · Glaucoma is an acquired loss of retinal ganglion cells and axons within the optic nerve or optic neuropathy that results in a characteristic optic nerve head appearance and a corresponding progressive loss of vision.
Optic Disk Size and Glaucoma - PMC - PubMed Central (PMC)
Detection of characteristic glaucomatous optic disk damage involves the measurement of the size and shape of the neuroretinal rim and optic cup.
What Happens to the Optic Disc and Retina in Glaucoma?
In glaucoma, there is a spectrum of disc damage ranging from highly localized tissue loss (a notch in the neuroretinal rim), vertically oval cupping, or simple concentric enlargement of the cup. The accompanying visual loss may likewise range from a well-localized nerve fiber bundle defect to a generalized depression.
Glaucoma (Nursing) - StatPearls - NCBI Bookshelf
Low-tension or normal-tension glaucoma resembles POAG as there is the characteristic optic disc cupping and peripheral visual-field loss finding but the IOP readings are consistently less than 21 mm Hg. ... Worldwide, an estimated 60 million people have optic neuropathy due to glaucoma. The African population has the highest prevalence of open ...
The optic nerve head in glaucoma - PMC - National Center for ...
Glaucomatous optic neuropathy:generalised enlargement of cup. The ONH or optic disc is a round/oval ‘plug-hole’, down which more than a million nerve fibres descend through a sieve-like sheet known as the lamina cribrosa. These fibres are then bundled together behind the eye as the optic nerve which continues towards the brain.
The Pathophysiology and Treatment of Glaucoma - PubMed …
The convergence of the axons of retinal ganglion (RG) cells at the optic disc creates the neuroretinal rim; the rim surrounds the cup, a central shallow depression in the optic disc. Retinal ganglion cell axons exit the eye through the lamina cribrosa (LC), forming the optic nerve, and travel to the left and right lateral geniculate nucleus ...
Glaucoma: Diagnosis and Management - AAFP
Glaucoma is a group of eye disorders characterized by progressive deterioration of the optic nerve head and retinal nerve fiber layer (i.e., the portion of the optic nerve that runs through...