Final answer:
The correct pronunciation for nystagmus is 'nis-TAG-mus.' It is a condition resulting in involuntary eye movement, possibly affecting vision and balance.
Step-by-step explanation:
The correct pronunciation for nystagmus is "nis-TAG-mus." Nystagmus is a condition characterized by rapid, uncontrolled eye movements, which can be horizontal, vertical, or rotary. It may be congenital, meaning present at birth, or it can be acquired later in life due to various conditions including inner ear problems, multiple sclerosis, or brain injuries. People with nystagmus often experience problems with vision such as reduced visual acuity, and may have difficulties with balance or coordination.