This motor response occurs within minutes of drinking coffee and can last for up to 90 minutes. There is no gender difference in the effect that coffee has on motor activity (Rao et al, 1998), but it may not be related to caffeine.
Dilation of the pupil in an eye with the synechia can cause the pupil to take an irregular, non-circular shape (Dyscoria) as shown in the photograph. If the pupil can be fully dilated during the treatment of iritis, the prognosis for recovery from synechia is good. This is a treatable status. To subdue the inflammation, use topical corticosteroids.
Presumably, injury to the oculomotorand pupillomotor nerves causes a non-uniform paralysis or paresis of the sphincter of the pupil with the result thatthe antagonist dilator ofthe pupil has an eccentric effect, with the proÂ¬duction of an oval pupil.