An interesting question , Who can answer it ?

If we compare an eye with a digital camera, how mega pixel it would be?

Well the acuity of the human eye is typically about one minute (of arc) which is to say that the human eye can visually separate two objects separated by one arc minute.
One arc minute is equal to about 2 metres at a distance of 6km....which means that the human eye could just separate (see 2 lights rather than one) the headlights on a vehicle 6km away.
So depending on your cameras field of view at maximum optical zoom. it would need enough pixels to put each headlight in separate pixel with a dark pixel in between.

So given the field of view of the camera (the horizontal distance from the left side to the right side of an image it takes of the vehicle 6km away) you can calculate how many pixels you need across the image.
In 35mm photography, a 50mm lens is called a normal lens because it produces roughly the same picture angle as the human eye (about 46掳). This means the field of view is approx the same as the distance so at 6km the field of view would be 6km across.
Therefore from left to right across the camera view the camera would need 6000/0.66 (6km across divided by 0.66 metres to separate the headlights 2 metres apart with a dark pixel in between 2m divided by 3 pixels)
equals 9000 pixels across
For a square image the total area of pixels is therefore 9000x9000 =81 million..........so you need a 81 megapixel camera to equal the human eye...good question!

The human eye cannot be duplicated or matched!

depends on the persons vision

me, i have -6 megapixels in my right eye and -7 in the left eye...thats bad!!

what a way to take the fun out of things! (first answe) i mean its true but still!

a lot!

well, what you seem to not understand is that mega pixels are mainly important when enlarging an image that was taken at a much smaller size. the eye is the perfect image maker as it sees 3D, you cannot compare the two.

XXXXXXXXXX mega

ok the eye and the camera are completely different for starters the camera captures only an image when an eye captures a 3-D picture also megapixil-wise, a pixil is a square that captures a piece of a picture and obviously the more pixils the crisper, and detailed an images is, and since our eyes dont use pixils but just the ability to capture light of diffrent wave lengths then u cant really compare the two

If possibly we made a camera equivalent to the eye, potentially it could be a trillion pixils since we see things and process them with so much detail and tine tuning.

WE can't compare them together.because of that our eyes acts in continuos space but a camera lenses acts in discrete plane.so we can't compare them.