Existing or occurring outside the retina (the light-sensitive layer at the back of your eye).
From Latin 'extra' (outside) + 'retinalis' (relating to the retina, from Medieval Latin 'retina'). The retina name itself comes from 'rete' meaning net, because of its network structure.
When scientists study vision, they distinguish between what happens inside the retina versus extraretinal effects—like how your eye's movements or the muscles around it affect what you see, separate from the actual light-detecting cells.
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