The eye is peculiar in that the nerve ganglia and the bipolar cells (connecting nerve cells between the photoreceptors and the ganglia) in the retina are
anterior to the photo-receptors (rods and cones). See
http//biology.clc.uc.edu/fankhauser/Labs/Anatomy_&_Physiology/A&P202/Special_Senses/Eye/eye_jpegs/optic_nerve_PC271516_lbd.JPG.
(The eye faces right.) One would think that a better design would place the ganglia and the bipolar cells
posterior to the photoreceptors to provide a clearer field of view.
It is conjectured that the mammalian eye evolved from light-sensitive spots on primitive, smallish, lancelet-type chordates, similar to present-day
Amphioxus. The story of the evolution of the eye and why the ganglia and photoreceptors are ‘flipped’ is an interesting tale.
And so to the tune of "It's a Long Way from Tipperary" comes the biology student's ditty:
It's a long way, from Amphioxus,
⠀⠀⠀⠀It's a long way, to us.
It's a long, hard way from Amphioxus,
⠀⠀⠀⠀To the meanest human cuss.
Good-bye fins and gill-slits,
⠀⠀⠀⠀Hello teeth and hair.
It'a a long, hard slog from Amphioxus,
⠀⠀⠀⠀But we came, from there.
I still remember the words after all those years. I dedicate the tune to Mr. Black.