Man can change his pupil size on command • Hacker News Board

Re: Man can change his pupil size on command

#151

Post by raxxorrax » Thu, Sep 02, 2021, 9:27 AM UTC

oxplot wrote: post #147

I am the only person I know in my group of friends who can change the focus of my eyes independently of the distance of the object I’m looking at. In other words, I can make vision go blurry (wide eyes open) without it going double.

Isn't that the mechanism for these magic images like this:

http://www.magiceye3ds.com/3dpics/img/043magiceye3d.jpg

Some people can just adjust their focus and see it immediately. Some need to put their nose through the monitor first.

edit: you should see a heart, but if you resize the image you might see something different.

Re: Man can change his pupil size on command

#152

Post by dozzman » Thu, Sep 02, 2021, 9:48 AM UTC

I can also do this. I do it as eye exercises when I’m staring at screens for a long time.

Re: Man can change his pupil size on command

#153

Post by msdrigg » Thu, Sep 02, 2021, 12:30 PM UTC

uj8efdkjfdshf wrote: post #102

monitron wrote: post #94

Earlier quoted context omitted.

That's neat. I wonder if the pupil is actually changing size, or if it's the changing shape of the lens that is making it appear so. If you look into a camera lens as the focus is changed, the inner parts of the camera do appear to change size.

It's the accommodation reflex [0] at work here - pupillary constriction goes hand in hand with a shortening of the focal length of the lens, and the eyes also converge together. This is a brainstem level response, so I doubt there'd be any easy way to dissociate these movements consciously. [0] https://en.wikipedia.org/wiki/Accommodation_reflex

Interesting, this makes sense. Thanks for figuring it out

Re: Man can change his pupil size on command

#154

Post by oxplot » Fri, Sep 03, 2021, 7:20 AM UTC

raxxorrax wrote: post #151

oxplot wrote: post #147

I am the only person I know in my group of friends who can change the focus of my eyes independently of the distance of the object I’m looking at. In other words, I can make vision go blurry (wide eyes open) without it going double.

Isn't that the mechanism for these magic images like this: http://www.magiceye3ds.com/3dpics/img/043magiceye3d.jpg Some people can just adjust their focus and see it immediately. Some need to put their nose through the monitor first. edit: you should see a heart, but if you resize the image you might see something different.

That requires you crossing your eyes, or look past the image, which makes your vision double.

Re: Man can change his pupil size on command

#155

Post by pempem » Mon, Sep 13, 2021, 8:31 PM UTC

zafka wrote: post #115

pempem wrote: post #80

Earlier quoted context omitted.

I've only recently started taking control of my breath (despite my parents suggesting I learn it in childhood). It is hard to imagine the impact when you're not doing it. When you start consider that you're going to try for a minute, then three, then five. It is truly insane the amount of change you'll experience.

Yes, please give a few details of how you are doing your practice.

Sure

Parents -- Its cultural. They're Indian, I'm Indian American. Square breathing and other kinds of breathwork are maybe more commonly discussed as a result.

Practice: Here's where my American-ness comes in. I've been using headspace and the Wim Hof method in the evenings and morning as well as yin yoga which is way slower than the vinyasa/cardio yoga I used to do. Sometimes I use headspace even in a lyft or during air travel

It honestly still drives me insane from time to time to be slowing down but when I (rarely still) manage to break through my frustration it changes my mood and approach.