Loss of vision may occur due to occlusion of –
**Core Concept**
The question is testing the understanding of the anatomical structures responsible for maintaining vision and the potential consequences of their occlusion. The optic nerve is a critical structure for transmitting visual information from the retina to the brain.
**Why the Correct Answer is Right**
The correct answer is the optic nerve. The optic nerve is responsible for transmitting visual information from the retina to the brain. Occlusion or damage to the optic nerve can lead to loss of vision due to the interruption of this critical neural pathway. This is a common cause of visual loss in conditions such as optic neuritis, pituitary apoplexy, or head trauma.
**Why Each Wrong Option is Incorrect**
**Option A:** The ophthalmic artery is responsible for supplying blood to the eye, but its occlusion would lead to ischemia of the eye rather than loss of vision.
**Option B:** The central retinal artery supplies blood to the inner layers of the retina, but its occlusion would lead to ischemia of the retina rather than loss of vision.
**Option C:** The anterior cerebral artery is involved in supplying blood to the medial surface of the brain, but its occlusion would lead to motor and sensory deficits rather than loss of vision.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that bilateral optic nerve occlusion can result in a "blind" patient with preserved pupillary light reflexes, as the afferent pathway is affected but the efferent pathway remains intact.
**Correct Answer:** C. The optic nerve.