The definition of a biennium is a period of two years. Your two-year cell phone contract is an example of a biennium. noun.
Common symptoms reported by people with Vestibular Neuronitis. Reports may be affected by other conditions and/or medication side effects. We ask about general symptoms (anxious mood, depressed mood, insomnia, fatigue, and pain) regardless of condition.
The main symptoms of Optic Neuritis are: 1  Loss of visual acuity (blurring of vision) which occurs in around 58% of ON cases. 2  This can range from mild blurring of vision in 34% of cases, through moderate loss of acuity (12%), to severe or total loss of light perception (complete blindness) in 54% of cases.