How does the human eye see objects?

a.
light absorbed by objects, enters the eyes, and is refracted by the optic nerve in the retina.

b.
light reflects off objects, enters the eyes, and is detected by the optic nerve in the retina.

c.
light refracts off objects, enters the eyes, and is captured as a photograph by the lenses.

d.
light reflects off objects, enters the eyes, and is detected by light-sensitive cells in the retina.