Optic Nerve Flashcards
What artery supplies the optic nerve?
Posterior ciliary artery. Except for NFL which is supplied by the retinal circulation
Name the four parts of the optic nerve.
- Surface nerve layer
- Perlaminar region
- Laminar Cribosa
- Retrolaminar
T/F: in the retrolaminar region mylenation is aquired and there is a decrease in astrocytes.
True
Venous drainage of the optic nerve is through ?
Central retinal vein.
What is the purpose of astocytes in optic nerve?
Provides continuous layer between nerve fiber and blood vessels of optic nerve head
How is the lamina cribosa of glacoma eye compared to normal eye.
Healthy: round in eyes with physiologic cupping
however in Glaucoma: Compressed pores
T/F: Lamina criposa are larger superiorly and inferiorly when compared to nasal and temporal
True
T/F: Connective tissue of lamina cribrosa is incompletely developed in young children
True
What is tilted disc syndrom
Horizontally oval disc
What are the two types of autoregulatory mechanisms?
Metabolic
Myogeneic
What are the two theories of glacoma pathogenesis?
Mechanical and vascular
