External Orbital Characteristics Flashcards
What is the anatomical term for eyelid?
Palpebra
What are the layers of the eyelid?
- skin
- orbicularis oculi muscle
- tarsal plate/tarsus
- palpebral conjunctiva
What attaches the tarsus to the walls of the orbit?
Medial and lateral palpebral ligaments
What are the names given to the modified sebaceous gland in the tarsus of the eyelid?
Tarsal or Meibomian gland
What is the location of the Meibomian gland?
Tarsus of the eyelid
What is the function of Meibomian gland?
Produces a thick, hydrophobic substance that prevents tears from overflowing onto the cheeks along the margin of the eyelid
Eyelashes represent a modification of what cell extension?
Cilia
What is the name of the modified sebaceous gland located at the base of the eyelash?
Ciliary gland
What is the name given to the inner mucous membrane of the eyelid?
Palpebral conjunctiva
What is the name of the mucous membrane attaching to the eyeball?
Bulbar conjunctiva
What is the name given to the blind sac formed between the palpebral and bulbar conjunctiva?
The superior or inferior fornix
What is the name given to the angle formed between the superior and inferior eyelids at their medial and lateral margins?
Canthus
What are the names given to tissues forming a rounded medial canthus?
Epicanthal fold, palpebronasal fold, Mongolian fold, or epicanthus
What is the name given to the union of skin at the eyelid margins?
Medial palpebral commissure or lateral palpebral commissure
What is the name given to the slit-like opening formed between the eyelids?
Palpebral fissure
