Fascinating. I get very different results depending on which glasses I use.
I'm far-sighted with a relatively weak prescription.
Without glasses I have a tiny bit of lazy eye, it's not really perceptible for the most part looking at me, but for stuff like this I get a sort of figure-eight shaped blob of motion that skips around a fair bit which I guess is because my eyes fail to track correctly and can't find anything to focus on. Can't perceive the motion outside of this area.
With my regular glasses this there's still some of this effect, but much less pronounced. Can't see any motion outside of the center of my field of view.
With my reading/screen glasses, which technically makes me myopic, I get a large perfect circle, and can still detect a lot of motion outside of the circle, even if it's "low FPS".
The strength of the glasses alters the size of the image that lands on your retinas. More (-) means a smaller image thus you stop seeing movement much closer to the focal point.
Hi, I don't know what this is supposed to do, but I get pretty bad migraines and loading the page made me feel extremely strange almost immediately so I closed it.
I would check to make sure this can't trigger migraines or seizures. Maybe it's just me, but also, please double check.
How would someone possibly ācheckā that? What method are you proposing?
I don't usually have headache migraines but do have strong visual auras from time to time.
Looking at this it first looked fun: "whoa, that's cool, this fovea thing is really smaller than I imagined"
After a minute or so playing around I closed the window and then I noticed a form of retina persistence that looked eerily similar to an onset of a visual aura, as well as some faint but clear ear ringing, both typical symptoms of the migraines I experience.
I immediately walked away from the computer and although dwindling it's still in effect 10min out.
Yes. Occasional migraine sufferer with aura here. Don't look at this unless you want to spend the next 15 minutes worrying "am i getting an aura or not".
Yes, immediately felt weird and a bit uncomfortable. I can almost see, or kind of sense, all those parts moving in the image even though I can only see the movement clearly in the center. I can easily imagine getting a headache from watching that for a longer time.
Its supposed to show you how big of a radius your eye can focus on at a time, as we age the radius shrinks.
Edit: seems like there isn't enough research to suggest the latter. Apologies
Shadertoy got hugged to death by this shader a few years ago and it had a custom "please go away" banner for a little while. Funny seeing it show up again on HN front page.
https://web.archive.org/web/20210430091013/https://www.shade...
That's pretty cute. IQ's a good guy, he's had every opportunity over the years to monetize Shadertoy but it's stayed free and true to its purpose for 12y now.
It's important to point out that all of the crosses are rotating, so this is effectively showing which parts of your vision are susceptible to change blindness (which is effectively 99% of it).
I first thought the spinning was an optical illusion, like https://www.nationalgeographic.com/science/article/how-our-b.... But in this case the spinning is real and you donāt see the rotation except in a small area (your fovea).
Hah, so my comment here spawned a post: https://news.ycombinator.com/item?id=45904434
Yup :)
The site is unavailable, because it is infected with cloudflare.
Seem iquilezles has finally given in. He's been complaining about crawler attacks a lot in the last months/years.
https://x.com/iquilezles/status/1977172864785957340 https://x.com/iquilezles/status/1976866381099679817 https://x.com/iquilezles/status/1838858759336267842
How can you have problems hosting a website that is so obviously cacheable.
.... Which is why he used cloudflare. Caching isn't magic.
How strange; it worked on my machine. Is your network incompatible with Cloudflare?
woah its incredible how quickly i can spot the fuzzy spot around where i can clearly see the rotation, and when i unfocus can see fuzzy movement all around. This is really cool. So this is the theory beind foveated rendering/streaming
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