Which of the following is a manifestation of a transient ischemic attack?

• A. Loss of vision in one eye
• B. Chronic dizziness lasting weeks
• C. Permanent paraplegia
• D. Continuous severe headache for days

Answer: (A)

A transient ischemic attack is a brief episode of neurologic dysfunction caused by a temporary reduction in blood flow to a part of the brain or retina, with full recovery and no lasting damage. A classic sign is sudden, transient loss of vision in one eye, often described as a curtain or shade coming down over the eye. This occurs from temporary retinal ischemia (amaurosis fugax) due to an embolus or reduced blood flow in the ophthalmic circulation. The other scenarios describe problems that are not typical of a TIA: dizziness lasting weeks suggests a chronic vestibular issue, paraplegia would be a lasting deficit from a stroke or spinal injury, and a continuous headache for days points to a different diagnosis such as a migraine or other headache disorder. So, loss of vision in one eye best fits a transient ischemic attack.