Question

which of the following pathological conditions is characterized by jerky involuntary eye movements?
a nystagmus
b photophobia
c hemianopia
d strabismus

Explanation:

• Nystagmus: It is defined as involuntary, rhythmic eye movements. These can be horizontal, vertical, rotary, or mixed and are often jerky.
• Photophobia: This is an extreme sensitivity to light. It does not involve involuntary eye - movements.
• Hemianopia: It is a visual field defect where half of the visual field is lost. There is no mention of involuntary eye - movements in its definition.
• Strabismus: It is a condition where the eyes are misaligned. The misalignment is a static (or sometimes slow) positional issue rather than involuntary, jerky movements.

Answer:

A. nystagmus