Optic nerve

Question 1

Ethambutol

Answer 1

> 15mg/kg. 3-6 months. bi central blurring. normal or slightly swollen, splinter hemor, red-green dyschromatopsia, prolonged recovery

Question 2

Vigabatrin

Answer 2

bi concentric, nasal visual field constriction. photoreceptor and ganglion cell damage. >3kg. changes persist.

Question 3

Methotrexate

Answer 3

acute or gradual visual loss