The title is horribly worded, but I have no idea how to otherwise title it.
Basically, the idea behind these special eyes is that they would be structured much like real-life compound eyes, but the first half of the ommatidia tunnel is mostly filled with a black mass that would absorb any light it touches, meaning only light reflected from a narrow angle from the front of the ommatidia would get to the second half where all the photoreceptor cells lie. These photoreceptor cells would then discern the colour of that light. Repeat this for each ommatidia in the eyes and you get a pixelart-like image, composed of individual hexagonal "pixels". The organisms would use multiple much smaller simple eyes (ocelli) to accurately detect distance.
The organisms in question would be mostly between the size of a mini Golden Retriever and a horse. The main supposed benefit of this eye type would be that the simple nature of a pixelated image would make the amount of brain space required to process it pretty small while allowing vision in all available degrees without the atrocious peripheral vision that human-like eyes have.
My main question is, is there something about the nature of light that I am missing that would make this unreasonable, impractical or otherwise outside of the realm of possibility?