The range of symptoms is very large, from having no obvious discomfort at all to having very obvious symptoms. Common manifestations include eye pain, red eyes, photophobia, tearing, blurred vision, seeing floating dark spots (floaters), or flashes. Anterior uveitis typically presents with pain in the front of the eye, congestion and photophobia, while posterior uveitis more often presents with decreased vision, distorted vision, or vitreous clouding and increased floaters. If joint pain, fever, or rash occur at the same time, doctors will consider systemic disease. Children especially are likely to have no obvious symptoms or be overlooked, so they are often found through vision screening or fundus examination. It should be noted that immune screening may sometimes show no obvious abnormalities, but this does not rule out the possibility that there is already structural damage to the fundus or uveitis.
My own experience is: I had no eye pain or red eyes or any symptoms since I was a child; I was only found to have decreased vision during kindergarten vision screening. A few months later I went to do slit-lamp and fundus examinations, and the results showed that the fundus already had structural damage; immune screening also had no obvious abnormalities. This experience made me deeply realize—that children may have serious lesions without feeling pain, so regular vision screening and necessary fundus examinations are very important.