3 ms·

My debatable factoid is that all vision is movement-dependent, including human vision, and so the bigness and wonderfulness of the tyrannosaur's eyes is beside

My debatable factoid is that all vision is movement-dependent, including human vision, and so the bigness and wonderfulness of the tyrannosaur's eyes is beside the point of whether it needed its prey to move around in order to perceive it. https://en.wikipedia.org/wiki/Stabilized_images https://en.wikipedia.org/wiki/Stabilized_images , https://en.wikipedia.org/wiki/Fixation_(visual) https://en.wikipedia.org/wiki/Fixation_(visual) , https://en.wikipedia.org/wiki/Microsaccade https://en.wikipedia.org/wiki/Microsaccade We fake the movement of anything we're staring at, by means of tiny automatic eye movements, in order to remain able to see the thing at all.

kowbell 4mo ago
These are really interesting. I've noticed when I'm spacing out and staring at a single point for a while that there's some kind of "tunnel vision" that develops, where everything besides the small point I'm looking at starts to darken and if I shift my body suddenly everything that was fading will "refresh." I always thought it felt similar to when a particularly bright light "burns in" your vision for a moment. Sounds a lot like the phenomenon described in the Stabilized Image article. Neat stuff!