Eye, orbit, orbital region, and the eyeball Flashcards
What is the glands divided into and what divides it?
The gland is divided into superior orbital and inferior palpebral parts by the lateral expansion of the tendon of the levator palpebrae superioris.
What stimulates the procuction of lacrimal fluid?
The parasympathetic impulses from CN VII (Facial nerve)
How many excretory ducts secrete lacrimal fluid?
8-12
Where does the excretory ducts secrete lacrimal fluid?
into the lateral part of the superior conjuctival fornix of the conjuctival sac
Where does the nasolacrimal duct open in the nasal cavity?
Inferior nasal meatus
What types of nerve supply does the lacrimal gland have?
It has both sympathetic and parasympathetic nerve supply.
How many extrinsic muscles controls the movements of the eyeball?
6
How many layers does the eyeball proper have?
3 layers
What forms the actual socet for the eyeball?
Fascial sheath of the eyeball (bulbar fascia/ tendon capsule)
What is the connective tissue layer of the eyeball composed of?
- Posteriorly - Fascial sheath of the eyeball (bulbar fascia/tendon capsule)
- Anteriorly - Bulbar conjuctiva
The fascial sheath
Is the most substantial portion of the suspensory apparatus
What secrets aqeous humor?
The ciliary processes
Where can we find accessory glands?
- In the middle part of the eyelid
- Along the superior or inferior fornices of the conjuctival sac
