The Orbit. B. External Orbital Characteristics Flashcards
What are the layers of the eyelid?
skin, orbicularis oculi muscles, tarsal plate/tarsus & palpebral conjunctiva
What are the names given to the modified sebaceous gland in the tarsus of the eyelid?
tarsal or Meibomian gland
What is the functions of the Meibomian gland?
produces a thick, hydrophobic substance that prevents tears from overflowing onto the cheeks along the margin of the eyelid
What are the names given to the modified sebaceous glands of the palpebra?
tarsal gland or Meibomian gland and ciliary gland
What is the name given to the angle formed between the superior and inferior eyelids at their medial and lateral margins?
canthus
What is the name given to the elevation at the medial canthus?
lacrimal caruncle
What is the crescent-shaped appearance of the conjunctiva at the medial canthus called?
plica semilunaris conjunctiva
What is the name given to the opening at the lacrimal papilla?
lacrimal punctum
The lacrimal punctum is continuous with what structure?
lacrimal canaliculus