Vitreous Flashcards
1
Q
What is vitreous composed of?
A
Water
Type II and IX collagen
Mucopolysaccharides
Hyaluronic acid
Volume 4 cm3
2
Q
Vitreous base
A
Attaches to para plans and peripheral retina 4 mm posterior to Ora. And 2mm anterior
3
Q
Areas of vitreoretinal adhesion
A
Optic nerve Retinal vessels Vitreous base Macula Lattice degeneration Chorioretinal scars
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
5
Q
Giant retinal tear
A
More than 3 clock hours
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
7
Q
Precursors to retinal breaks
A
Enclosed IRA bays Meridional folds Meridional complexes Cystic retinal tufts Zonular tufts
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