Bacteria. Bacteria are one-celled organisms visible only with a microscope. They're so small that if you lined up a thousand of them end to end, they could fit across the end of a pencil eraser. Not all bacteria are harmful, and some bacteria that live in your body are helpful.For instance, Lactobacillus acidophilus â a harmless bacterium that resides in your intestines â helps you digest food, destroys some disease-causing organisms and provides nutrients.acteria are one-celled organisms visible only with a microscope. They're so small that if you lined up a thousand of them end to end, they could fit across the end of a pencil eraser. Not all bacteria are harmful, and some bacteria that live in your body are helpful.
Optic atrophy is the final common morphologic endpoint of any disease process that causes axon degeneration in the retinogeniculate pathway. Clinically, optic atrophy manifests as changes in the color and the structure of the optic disc associated with variable degrees of visual dysfunction. Optic atrophy is actually a misnomer; in the strict histologic definition, atrophy refers to involution of a structure resulting from prolonged disuse.
Optic neuritis is inflammation of the optic nerve, caused by damage to and loss of the protective sheath (myelin) surrounding this nerve that is so vital for good vision.Demyelinating optic neuritis is another term for this eye condition. Vision symptoms from optic neuritis can include blurring and blind spots.ou also may notice distorted vision, reduced color vision and pain when you move your eyes. These types of symptoms may precede vision loss due to optic neuritis. Optic neuropathy more generally describes optic nerve abnormalities or damage, including from causes such as blocked blood flow or toxic exposure.