In the blind spot demonstration, when staring at the + sign with your right eye, and moving the figure closer to your face, the dot in the figure suddenly disappears when it is focused on the

A) fovea centralis.
B) optic disc.
C) ciliary body.
D) macula lutea.
E) peripheral retina.

Optic Disc

The point on the retina at which the optic nerve fibers exit the eye, creating the blind spot as it lacks photoreceptors.

Fovea Centralis

A small depression in the retina of the eye where visual acuity is highest, due to the concentration of cone cells.

Blind Spot

The blind spot is an area on the retina without photoreceptors where the optic nerve exits the eye, resulting in a gap in the visual field.