Davids eyes are different...
Spaights draft tells us he can see things we cant persevere in our 3 dimensions... he can see like different wavelengths of light and communications the Engineers use that we cant..
Watts (Shaw) makes some Glasses from the Space Jockey Suit Eyes that allows her to see what David sees.
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But as far as Prometheus goes..... Davids eyes are more advanced.... his eyes can zoom in on details to a microscopic level.... he can see in the dark and maybe can see other spectrum's we cant... infa-red etc..