Which feature is the blind spot where the optic nerve can enter the eye?

• A. The region where the optic nerve exits the eye
• B. The light-detecting cells responsible for color vision
• C. The vascular layer supplying blood to the retina
• D. The blind spot where the optic nerve can enter the eye

Answer: (D)

The blind spot in vision is the optic disc, the spot on the retina where the optic nerve fibers converge and exit toward the brain. That region has no photoreceptors (no rods or cones), so light hitting there isn’t detected, creating the blind spot. The option that identifies this exact feature—the blind spot associated with the optic nerve as it meets the retina—is the best description. The other options point to unrelated retinal components: color vision is from light-detecting cones, the vascular layer refers to the blood-supplying tissue, and describing a region as where the nerve exits is close but does not name the blind spot itself.