1 Iritis is uncommon, but can be due to trauma, infections, or autoimmune conditions. Symptoms include pain, red eye, and often, decreased vision.  Optic neuritis. The nerve travelling from the back of the eyeball into the brain can become inflamed.
Oak root fungus, or white rot, is a widespread disease that becomes visible just beneath the bark and on roots. What looks like layers of light brown to tan mushrooms form in clusters at the base of the trees.
The Body of a Fungus Fungi exist mainly in the form of slender filaments, barelyvisible to the naked eye, which are called hyphae (singular, hypha). These hyphae are typically made up of long chainsof cells joined end-to-end divided by cross-walls called septa (singular, septum).he Body of a Fungus Fungi exist mainly in the form of slender filaments, barelyvisible to the naked eye, which are called hyphae (singular, hypha). These hyphae are typically made up of long chainsof cells joined end-to-end divided by cross-walls called septa (singular, septum).