If the human eye were a camera or screen, what would be its resolution?

Factual Questions
1

I mean for a normal, healthy human eye.

If you want to answer that the human eye isn’t digital so the question doesn’t make sense, then replace my question with “What would its resolution have to be for humans to be completely unable to tell the difference?”.
Also, how many colors would it be capable of? Again, feel free to replace this question with “How many colors would it have to be capable of before humans would be completely unable to tell the difference?”.

2

According to Wikipedia, the resolution of the human eye is about 300 pixels per inch (depending on circumstances).

3

According to Wikipedia 4.5 million cone cells and 90 million rod cells. something like 100 megapixels?

4

The resolution of the retina varies enormously, from really pretty good at the center of vision (the foveola), where the receptor cells are packed very tightly to pretty darn poor at the periphery. Parts in between are in between, although the fall-off as you move outwards from the center is not linear. Actual effective resolving power, however, is higher than you might expect from simple receptor density, because of the use of coarse coding (probably) and the controlled use of eye movements to enhance edges (edges our brains care about, anyway) and the like. The human eye works in a very different way from a digital camera, and is not doing the same job. It is not sending a picture back to the brain (there is no-one there to see it), it is extracting information from the environmental light.

I am not sure if I understand your question about color. How many colors can the human eye discriminate? I don’t have the actual figure at my fingertips, but it is a buttload. How many types of color detector, at a minimum, would an artificial system need to approximate the color discrimination abilities of the human eye? Three, just like the eye has.

5

Speak for yourself. :stuck_out_tongue:

6

Slight tangent but interesting:
I was reading some recent research that found the eye detects finer detail than is ultimately passed on to your conscious processing - nerves in the eyes responded to finer lines than the subject was able to distinguish.