Anatomy Flashcards
what makes up the roof of the bony orbit?
the frontal bone
what makes up the lateral wall of the bony orbit?
sphenoid bone and zygomatic bone
what makes up the medial wall of the bony orbit?
ethmoid bone
lacrimal bone
frontal bone
maxillary bone
what makes up the floor of the bony orbit?
maxillary bone
why is the superior orbital margin more anterior than the inferior orbital margin?
allows eyeball to be protected from a blow larger than the diameter of the orbital rim
what is an orbital blowout fracture?
when an impact causes the medial wall or floor of the bony orbit to fracture but the orbital rim remain intact
what surrounds the eyeball?
periorbital fat
what neurovascular bundle is susceptible to injury in an orbital blow out fracture?
infraorbital neurovascular bundle
what muscle surrounds the orbital rim?
the orbicularis oculi
what are the 2 parts to the orbicularis oculi?
external- orbital part
internal- palpebral part
what is the function of the superior and inferior tarsi?
skeleton of the eyelid
give the eyelid it’s half moon shape
what muscle attaches to the superior tarsus?
levator palpebrae superioris
what is the function of the levator palpebrae superioris?
lifts the upper eyelid
what ligaments anchor the superior and inferior tarsi to the bone?
lateral palpebral ligament
medial palpebral ligament
what connective tissue are the tarsal glands within?
superior and inferior tarsi
what part of the eye is coloured?
iris
what covers the iris?
the cornea
what is the white part of the eye?
the sclera
what covers the sclera?
conjunctiva
what is the name of the opening that lacrimal fluids pass into?
punctum
what is the conjunctival fornix?
the angle on the lower and upper eyelid where conjunctiva of sclera and conjunctiva of eyelids meet
what duct takes lacrimal fluid from the punctum to the inferior meatus?
nasolacrimal duct
which nerve carries parasympathetic fibres to the lacrimal gland?
CN VII
what are the 2 parts to the fibrous outer layer of the eye?
- sclera
- cornea