Where is the blind spot located?

• A. At the center of the retina.
• B. At the point where the optic nerve leaves the retina, where there are no receptor cells.
• C. On the cornea.
• D. In the vitreous humor.

Answer: (B)

Light detection happens in the retina where there are photoreceptors (rods and cones). The blind spot is where the optic nerve leaves the eye, at the optic disc, and there are no receptor cells there. Since no light is detected in that tiny patch, a gap shows up in the visual field. Your brain usually fills in this missing area using surrounding details, so you don’t notice it during normal vision. The center of the retina has many receptors for sharp vision, the cornea is the clear front surface of the eye, and the vitreous humor is just the gel between lens and retina, none of which create a blind spot.