Antimuscarinics dilate the pupil and paralyse the ciliary muscle. They vary in potency and duration of action. They are used in the treatment of anterior uveitis as an adjunct to corticosteroids.
Tropicamide is short-acting antimuscarinic (lasts for 4-6 hours) and is a relatively weak mydriatic. It is used to facilitate examination of the fundus of the eye.