Blurry vision underwater is due to pupil dilation, which can be controlled to see as if wearing mask

[Texasguy]

The video explains why we see blurry underwater, check it out.

Evidently, one can train themselves to control pupil dilation: Example 1 and Example 2

 

[GlassGuy808]

That was interesting, I wish I knew this when I was younger.
Thanks for posting this!

 

[Freewillow]

Interesting. In the example , you see pupil dilatation. If I understood your video, what you want to do is to close your pupil. Any idea how to do this?

 

[Texasguy]

Well, best way is to put a camera near the eye and watch/record. I read that if one wants to learn to control a heart rate, one needs to see the results live, say through a gadget. I guess similar applies here.

 

[ScubaSteve85]

Well, best way is to put a camera near the eye and watch/record. I read that if one wants to learn to control a heart rate, one needs to see the results live, say through a gadget. I guess similar applies here.

A mirror is probably an easier solution.

This is super interesting and makes a lot of sense if you think about focal length and the pupil as the eye's apeture. Thanks for sharing!

 

[Rred]

My zen master never mentioned conscious pupillary dilation control. I'll have to ask about that.

Or you could get the LED eyelash strings (honest) from eBay, couple of bucks each, battery powered, a string of mini-LEDs that stick just above your eyelashes. The extra light pointed back up into your eyes should help the pupils constrict. Any light shining into your eyes (counteracting the darkness of the underwater environment) should help.

 

[tursiops]

The problem is that the title of the thread is misleading. It is not dilation that makes things blurry, it is things being out of focus. "Stopping down" the eye gives more depth of field.

 

[Texasguy]

The problem is that the title of the thread is misleading. It is not dilation that makes things blurry, it is things being out of focus. "Stopping down" the eye gives more depth of field.

This is not what the video says.

 

[tursiops]

This is not what the video says.

It's your title.

 

[Texasguy]

It's your title.

And I stand by it.