Eyes

Question 1

Horner’s and CN3 palsy both cause ptosis. How to differentiate?

Answer 1

Horner’s: ptosis, miosis (SMALL pupil), anhidrosis

CN3 palsy: ptosis, DILATED pupil, down & out

Question 2

Acute glaucoma and anterior uveitis both cause painful vision loss. How to differentiate?

Answer 2

Glaucoma: DILATED pupil,
Anterior uveitis: CONSTRICTED irregular pupil, redness focussed around iris

Question 3

Latanoprost mechanism of action

Answer 3

Increases uveoscleral outflow

Note causes brown eye pigmentation
Glaucoma tx

Question 4

Acetazolamide mechanism of action

Answer 4

Reduces aqueous production
Glaucoma tx

Question 5

Pilocarpine mechanism of action

Answer 5

Increases uveoscleral outflow, constricts pupil
Glaucoma tx

Question 6

Cyclopentolate mechanism of action

Answer 6

Dilates eye (used for anterior uveitis)

Question 7

Timolol mechanism of action

Answer 7

Reduces aqueous production
Glaucoma tx

Question 8

Brimonidine mechanism of action

Answer 8

alpha agonist

Reduces aqueous production + increases outflow

Avoid if taking MAOI, TA. Can worsen coronary insufficiency