[Virginia-American]

The cornea, the rod, the pupil, the iris... none of which serve any other function. And if any of them were missing, you couldn't see.

False again. You wouldn't see as well without rods, but you wouldn't be blind either (ever hear of night-vision loss from vitamin-A deficiency)

[Dimensio]

You wouldn't see as well without rods, but you wouldn't be blind either (ever hear of night-vision loss from vitamin-A deficiency)

I knew of someone who was missing either rods or cones in his eyes. He was legally blind, but apparently had good nightvision (so I suspect that it was probably cones, rather than rods).