Setting aside the notion of determining the number of individual animals on the planet for a moment, merely determining the number of species on the Earth is challenging. Science has only been able to offer estimates thus far, and totals vary greatly.
A. A. A. Multiple sclerosis, or MS, is a long-lasting disease that can affect your brain, spinal cord, and the optic nerves in your eyes. It can cause problems with vision, balance, muscle control, and other basic body functions. The effects are often different for everyone who has the disease.
Researchers now view glaucoma as a disease of the brain â a neurodegenerative disease â rather than simply an eye disease. Recent research has shown that the complex connection between the eye and the brain is an important key to the disease. Glaucoma shares a number of features with degenerative brain diseases such as Alzheimerâs, Parkinsonâs, and Lou Gehrigâs disease. In all of these diseases, age and family history are significant risk factors, and specific areas of the brain are damaged over time.