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.
1 Cataracts. 2  Cataracts may cause ghost images, usually in one eye only. 3  This is because the clouding of the eye's natural lens that sits behind the pupil can cause light rays to scatter in different directions, creating multiple but incomplete images, especially when you look at lights.