What are the two most common causes of transient vision loss?

Transient vision loss can be caused by a variety of factors, but the two most common causes involve conditions that can lead to inadequate blood flow to the retina or issues with the vascular supply to the eye. Emboli refer to particles or gas bubbles that travel through the bloodstream and can obstruct blood vessels, leading to sudden vision changes. This can manifest during a transient ischemic attack or even a stroke affecting the ocular region.

Giant Cell arteritis, on the other hand, is an inflammatory condition that affects the large and medium-sized arteries, often including those that supply blood to the eyes. This condition can lead to vision loss due to the blood supply being compromised, making it a significant concern particularly for older adults.

Together, these two causes—emboli leading to vascular obstruction and Giant Cell arteritis causing inflammatory damage—represent major contributors to transient vision loss. Recognizing these causes is critical for timely intervention and preventing more permanent vision loss.