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.
What Is Optic Atrophy? The optic nerve is a bundle of nerve fibers that carry images from your retina to your brain. Each fiber carries a part of the visual information to the brain. If these nerve fibers become damaged, the brain doesn't receive all of this vision information and sight becomes blurred. Optic atrophy means the loss of some or most of the nerve fibers in the optic nerve. The effects range from visual change to severe visual loss.