Based on the above data for the resolution of the human eye, let's try a "small" example first. Consider a view in front of you that is 90 degrees by 90 degrees, like looking through an open window at a scene. The number of pixels would be 90 degrees * 60 arc-minutes/degree * 1/0.3 * 90 * 60 * 1/0.3 = 324,000,000 pixels (324 megapixels). read more
It takes two pixels to represent one cycle, so this is equivalent to 35 to 40 cycles per degree. If you look at MTF curves of the human eye, most of them have very little response beyond 30 cycles per degree. The best simple answer I can provide is that the human eye can see between 200 and 250 pixels per inch at a distance of 14 inches. read more
So, for the eye, imagine a sensor with a huge number of pixels, about 120 million. There's a higher density of pixels in the center of the sensor, and only about 6 million of those sensors are filtered to enable color sensitivity. read more