6. anatomy of the eye (lecture) Flashcards
which gland supplies the eye?
lacrimal canal (lateral upper)
where do secretions from the lacrimal canal drain?
across eye, medially to lacrimal canal –> lacrimal sac (top of nose) –> nasolacrimal duct –> inferior meatus of nasal cavity
what drains into inferior meatus and what drains into middle meatus?
only nasolacrimal duct (tears) drain into inferior meatus
all sinuses drain into middle meatus
which bones make up the bony orbit of the eye?
frontal zygomatic ethmoid sphenoid lacrimal maxilla
which bone contains the openings into the orbit?
sphenoid:
superior and inferior orbital fissure
optic canal
what forms the apex of the orbital?
optic canal
what is significant about the optic canal?
where the optic nerve enters the orbit
what forms the roof of the orbit?
frontal and sphenoid bones
sphenoid contains openings into orbit
what forms the lateral wall of the orbit?
zygomatic + sphenoid bone
what forms the medial wall of the orbit?
ethmoid
maxillary
lacrimal
sphenoid
what forms the inferior (base) of the orbit?
maxillary (teeth)
zygomatic bones (infero-lateral)
(weakest part of orbit)
main openings into the orbit?
- optic canal
- superior orbital fissure
- inferior orbital fissure
- nasolacrimal canal
how do you remember which structures pass through the superior orbital fissure? (sphenoid bone)
live frankly to see absolutely no insult
what does live frankly to see absolutely no insult stand for?
Lacrimal and Frontal (ophthalmic V1), Trochlea (IV), Superior oculomotor (III), Abducens (VI), Nasociliary (ophthalmic V1), Inferior oculomotor (III)
Superior Ophthalmic Vein AS WELL
what travels through the optic canal? (sphenoid bone)
optic nerve
opthalmic artery
