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worldsavior • yesterday at 8:19 PM • 8 replies • view on HN

There is no such thing as refresh rate for any kind of eye.


Replies

throwaway219450 • yesterday at 8:36 PM

There are odd visual illusions though, like humans perceive the Wagon-Wheel Effect even though there's no obvious reason it should happen. This is the effect where the speed of a rotating object varies depending on its sync with a discrete exposure period.

https://en.wikipedia.org/wiki/Wagon-wheel_effect

https://research.tue.nl/en/publications/subjective-strobosco...

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stevenwoo • yesterday at 8:57 PM

I highly recommend the pop science book An Immense World by Ed Yong to disabuse you of this notion. There is a sort of refresh rate (not exactly the same but good metaphor) for everything at every level of living being we study. It gives enough information for you to read the actual studied should you have more questions after reading it.

quirkot • yesterday at 8:27 PM

Yeah, i know that's how the physics works, but effectively my computer monitor doesn't flicker for me but a strobe light does. Whatever the proper term for that is what I'm talking aobut

jschveibinz • yesterday at 8:30 PM

But there is a neurological component in "optical processing" that can be modeled as a discrete rate of update although the underlying physiology is still being investigated.

nine_k • yesterday at 8:31 PM

There is for the visual cortex though.

Try walking outside in a clear night. Look up, notice some stars, or aircraft lights. Now rotate in place, and see how low your vision's FPS is in the dark: the rotation will be visibility jumpy.

An insect, with its much simpler visual processing, and facing a bright light, will likely achieve a much higher FPS, sufficient for the sub-kilohertz flicker to be very visible.

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DoctorOetker • yesterday at 11:47 PM

It's called the flicker fusion threshold.

smallmancontrov • yesterday at 8:24 PM

Nyquist had something to say about that.