2007-12-30 17:07:39 · 6 answers · asked by Anonymous in Health ➔ Optical
Not that impressive, nowadays!
The retina contains about 110 million photoreceptors, so that's one answer but, as the optic nerve in each eye contains only(!) about 1.2 million fibres*, these do not supply individual "pixel" information to the brain, except near the macula, the bit of the eye used for fine vision, where there may be a one receptor / one nerve fibre correspondance.
(but it's not as simple as that!)
The photoreceptor density at the macula is 147,000 per sq mm.
Further out towards the periphery there is considerable grouping and processing of the individual receptors into information carried by many fewer fibres.
In this respect the eye is nothing like a digital camera.
It's already doing computer-effect things like edge enhancement at the retinal level.
*and not all of these carry retinal visual information.
2007-12-30 19:28:00 · answer #1 · answered by Pedestal 42 7 · 1⤊ 0⤋
The vision is so strong and so sharp that it's hard to measure the sight in pixels. You might be looking at hundreds maybe thousands!
2007-12-30 17:11:47 · answer #2 · answered by Flying High 3 · 0⤊ 0⤋
i dont see pixels,
maybe if i look close enough...
2007-12-30 20:38:59 · answer #3 · answered by Mr. Awesome 4 · 0⤊ 0⤋
a heck of a lot - in the millions probably (at 20/20)
2007-12-30 17:09:48 · answer #4 · answered by Anonymous · 0⤊ 1⤋
you mean what you see? that's really cool i had never thought about that.....seems like alot..measure it with a ruler? your blind spot to blind spot?
2007-12-30 17:10:12 · answer #5 · answered by Anonymous · 0⤊ 0⤋
depends on what vision you have
2007-12-30 17:09:17 · answer #6 · answered by Raven Z 3 · 0⤊ 0⤋