Vitreous Flashcards

1
Q

What is vitreous composed of?

A

Water
Type II and IX collagen
Mucopolysaccharides
Hyaluronic acid

Volume 4 cm3

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2
Q

Vitreous base

A

Attaches to para plans and peripheral retina 4 mm posterior to Ora. And 2mm anterior

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3
Q

Areas of vitreoretinal adhesion

A
Optic nerve
Retinal vessels
Vitreous base
Macula 
Lattice degeneration 
Chorioretinal scars
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4
Q

Asteroid hyalosis

A

Calcium soaps in vitreous.
Age and diabetes
Use FA to look for abnormalities.

Path: gray spheres with Maltese cross birefringence

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5
Q

Giant retinal tear

A

More than 3 clock hours

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6
Q

Operculated hole vs atrophic holes

A

Atrophic holes at higher risk of RD
Operculated holes the traction has been removed.

Don’t treat operculated holes

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7
Q

Precursors to retinal breaks

A
Enclosed IRA bays
Meridional folds
Meridional complexes
Cystic retinal tufts
Zonular  tufts
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8
Q

Differential for vitreous hemorrhage

A
Diabetes
Proliferative retinopathy
Trauma
PVC
Tersons syndrome
Retinal macroaneurysm
Retinal angioma
Child abuse
Pars planitis
X-linked retinoschesis
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