Comments
By Arete314159 2025-11-132:416 reply 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.
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.
By isoprophlex 2025-11-138:30 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".
How would someone possibly “check” that? What method are you proposing?
By kalium-xyz 2025-11-1317:142 reply there are a lot of papers on this (some made by inducing seizures in people under lab conditions). The most seizure causing things you could display are simply bars or a grid with moving details, sizes, or alternating in colors.
Basically if it gives you a headache to stare at or just has this sucky attention grabbing feel to it when you look at it its likely to cause seizures. I CBA to dig up the papers on this but there are a bunch if you want to really get into this.
By ashtakeaway 2025-11-1317:222 reply You should be arsed to dig it up because your parent comment is insinuating disbelief or sarcasm with quotation marks.
By kalium-xyz 2025-11-1319:24 Here is the study that came to mind: https://www.cell.com/current-biology/fulltext/S0960-9822(17)...
However as the above study iirc doesn't directly state that these patterns cause discomfort and doesn't contain any examples I suggest reading chapter 10 "Photosensitive Epilepsy and Visual Discomfort" of "hierarchies in neurology (1989)" on page 70-71 which proposes this AND contains an example you can look at yourself.
By nkrisc 2025-11-140:42 No, I’m quoting with quotation marks.
By shadyKeystrokes 2025-11-1320:10 [dead]
By irilesscent 2025-11-132:43 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
By kalaksi 2025-11-1315:44 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.
By Fabricio20 2025-11-136:211 reply Interesting, I wonder.. have you ever tried a VR headset? Does that cause you migraines as well? or maybe any other discomfort that'd prevent you from using it?
By thenthenthen 2025-11-136:46 Not op but, VR is no problem, but this microsoft ar/mr glasses gave me an instant crazy headache in places I did not even know I had matter (back of the head), apparently thats the visual processing part of your brain. Terrible experience that lasted an hour or so.
I don't know why you got downvoted. This seems like a very useful contribution.
I also don’t think it is downvote worthy.
The first part of the comment is very valuable. “I looked at it and it made me feel extremely strange almost immediately“. That is very good to know.
The second bit I’m less sure about. What do they mean by “check to make sure this can't trigger migraines or seizures”? Like what check are they expecting? Literature research? Or experiments? The word “check” makes it sound as if they think this is some easy to do thung, like how you could “double check” the spelling of a word using a dictionary.
I interpreted it loosely, as "be aware of the possibility, and stop looking at it at the first signs of issues".
By nkrisc 2025-11-1315:30 That seems to me to be a VERY generous interpretation of:
> I would check to make sure this can't trigger migraines or seizures. Maybe it's just me, but also, please double check.
By marginalia_nu 2025-11-1311:202 reply 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".
By iNic 2025-11-1414:17 I have the same thing for the red blue illusion [1]. With glasses I see this effect extremely strongly, and without it is barely perceptible.
By davidhs 2025-11-1313:30 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.
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 too bad we associate paying people for their work with not being a good guy
Keeping a site free for others to learn and share art is being a good guy.
Too bad that we associate monetizing a demoscene site with getting paid for your work.
If you are doing something and you dont get paid... Is not work.
By definition you have to be paid to call it work.
