The process of focusing or the condition of having a fovea; in technology, rendering with high detail at the center and less detail at the periphery.
From 'foveate' (adjective) plus the noun-forming suffix '-ion' (from Latin '-io'). The word has both anatomical and modern technological meanings.
Foveation is why VR becomes practical instead of requiring gaming PCs the size of refrigerators—by focusing computation where your eyes actually look, engineers borrowed biology's power-saving trick.
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