Lids, Conjunctive and Cornea

Question 1

what does the conjunctiva cover?

Answer 1

its a thin vascular membrane that covers the inner surface of eyelids and loops back over sclera it doesn’t cover the cornea- would decrease transparency if it did

Question 2

what are the two sets of muscles in eye? what do they do? what are they innervated by?

Answer 2

circular muscles - helps close eye (orbicularis occuli) - innervated by CN VII levator palpebrae superioris - elevates eyelid - innervated by CN III

Question 3

what causes ptosis?

Answer 3

CN III dystrophy/paralysis

Question 4

what causes inability to close eyelid?

Answer 4

CN VII palsy

Question 5

what can inability to close eyelid lead to?

Answer 5

can lead to exposure keratopathy = drying and ulceration of cornea from exposure

Question 6

what is collection of pus in eyelid called? what are the two types?

Answer 6

Question 7

what is the treatment offered to hordeolum externum/internum? what causes this condition?

Answer 7

there are 2 glands that secrete oils in eyelid:

• sebacious glands of eyelashes (causes hordeolum externum)
• meibomian glands inside tarsal plate (causes hordeolum internum)

Question 8

what cause the different types of hordeolum?

Answer 8

Question 9

what is conjunctivitis? what are the signs and symptoms? what is the treatment?

Answer 9

Question 10

what can cause viral conjunctivitis?

Answer 10

adenovirus

• usually lymph nodes in parotid region are inflammed or enlarged

Question 11

what are the 2 types of pathology of the cornea? give examples

Answer 11

Question 12

what is an advantage of corneal transplant?

Answer 12