Which of the following is NOT a cause of sudden vision loss?

Sudden vision loss can result from various ocular conditions, each involving specific pathological mechanisms. In this context, photophobia refers to an aversion or sensitivity to light, which is generally associated with conditions affecting how the eyes perceive light rather than conditions that directly impact the structure of the eye itself or the visual pathways essential for sight. Therefore, photophobia does not typically cause sudden vision loss; rather, it may be a symptom of another underlying issue.

In contrast, retinal detachment occurs when the retina separates from the back of the eye, leading to immediate vision loss. Central retinal artery occlusion results from blockage of the artery supplying blood to the retina, leading to sudden and often severe vision impairment. Vitreous hemorrhage involves bleeding into the vitreous cavity of the eye, which can obstruct vision depending on the severity and location of the hemorrhage. Each of these conditions can lead to a rapid and significant decrease in visual acuity, distinguishing them from photophobia, which does not result in vision loss.