thanks for your query.
Your description refers to a condition known as multiple sclerosis
. It is an inflammatory disease causing damage in brain. It usually presents with vision problems,difficulties with coordination and balance, muscle weakness
/cramps/spasm (causing difficulty in movements),Clumsiness or a lack of coordination,Numbness,problems in speech etc
It can be diagnosed with help of MRI and spinal tap
. Then it can be managed with disease modifying drugs
I advise you to visit doctor and rule out other similar conditions like muscular dystrophies, Brain infection or vitamin deficiencies.
Hope it helps.