How many useful pixels does one human eye provide to the brain?

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I'm interested in the number of useful pixels (doesn't matter if color or bw) the brain receives from one human eye at a given moment. I don't care that we frequently move our eyeball or head to create a panorama picture, that's a different topic. I'm getting conflicting information.

Retina:
>100 mio rods + 5 mio cones

Optical nerve:
~1 mio fibres (quite few, even Full HD has 2 mio pixels)

Does the brain really only get 1 Megapixel? Or does the optic nerve have some bus protocol? Only half of full HD seems implausibly low for me, given I gen tell different pixels when I fill my view with a full HD display. But 107 Megapixel appears to be way too high, given that I can fill my entire view with a 4K Display and don't see pixels.