Opthamology 2 Flashcards
what is mullers muscle and what is it supplied by
assists the levator in elevating the top eyelid. It receives sympathetic innervation which may be compromised in Horners syndrome causing ptosis
where is orbital cellutlits classified as
inflammation posterior to the septum and is sight threatening
what muscle controls eye closing
orbicularis oris
what is orbicularis oris supplied by
CN VII
which part of orbicularis oris is involved in normal blinking
palpebral part
where is the cornea thickest
peripherally
what is contained in the stroma of the cornea
regularly spaced collagen fibres
what is the outermost part of the lens called
the cortex
what is the innermost part of the lens called
the nucleus
what does the endothelium of the cornea do
maintains transparency by pumping fluid out of the stroma
which artery does CNIII run close to
runs in close proximity to the posterior communicating artery
and is hence vulnerable to aneursyms
where does the CN IV arise from
from the dorsal aspect of the brainstem and crosses over
a lesion of the left trochlear nucleus produces a contralateral muscle palsy
the trochlear nucleus lies below the cerebral aqueduct
where does CN IV enter the eye
the superior orbital fissure
where do the rectus msucels arise from
the common tendinous ring
what is the optic nerve sheath attached to
the common tendinous ring
