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ONSF – Acronym

Optic nerve sheath fenestration

Cupping

Increase in cup disc ratio is known as cupping Occurs in glaucoma Degree of cupping can be correlated with stage of glaucoma Normal cup disc ratio is 0.3

Ophthalmology

Cup disc ratio

Ratio of the size of optic cup to that of the optic disc Normally 0.3 to 0.4 Increased in case of glaucoma – known as cupping

Definitions

Optic cup

White, cup shaped area in the centre of the optic disc The size of the cup relative to the disc (cup to disc ratio) increases in glaucoma and

Ophthalmology

Lamina cribrosa sclerae

The fibers comprising the optic nerve exit the eyeball through a opening in the sclera in its posterior aspect. This opening is is covered by a mesh –

Ophthalmology

Vitreoretinal degenerations include the following conditions: Wagner syndrome Stickler syndrome Favre Goldmann syndrome Familial exudative vitreoretinopathy Erosive vitreoretinopathy Dominant neovascular inflammatory vitreoretinopathy Dominant vitreoretinochoroidopathy Wagner syndrome It is

Acronyms

ERG – acronym

Electroretinography

Definitions

Absolute scotoma

An area of the visual field in which there is complete loss of perception of light

Ophthalmology

Retinoschisis

Separation within the sensory retina Occurs at the level of the outer plexiform layer and the inner nuclear layer Can be congenital or acquired Seen as a transparent,

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