this post was submitted on 18 Jan 2024
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[–] [email protected] 17 points 7 months ago (2 children)

I know they are not parasites, but what are they? Strings of dead cells? Dead optical nerve? Any biologists here?

[–] [email protected] 16 points 7 months ago

If it's a persistent pattern, it's likely to just be variation in the density of the vitreous humor (eye jelly).

[–] [email protected] 11 points 7 months ago (5 children)

Not a biologist but it's called blue light entoptic phenomenon. Pretty interesting in general.

[–] [email protected] 23 points 7 months ago* (last edited 7 months ago) (1 children)
[–] [email protected] 5 points 7 months ago (2 children)

Hmm it says they're proteins... I wonder how many times magnification it has to be for it to appear the same size as a tree.

[–] [email protected] 8 points 7 months ago

It depends on the tree, obviously.

[–] [email protected] 5 points 7 months ago (1 children)

Or how close to your eye to give the perspective of the same size?

[–] [email protected] 3 points 7 months ago* (last edited 7 months ago)

"These are small ... but the ones out there are far away."

[–] [email protected] 12 points 7 months ago

For anyone too lazy to look:

Some may be individual red blood cells swollen due to osmotic pressure. Others may be chains of red blood cells stuck together; diffraction patterns can be seen around these. Others may be "coagula of the proteins of the vitreous gel, to embryonic remnants, or the condensation round the walls of Cloquet's canal" that exist in pockets of liquid within the vitreous.

~ https://en.m.wikipedia.org/wiki/Entoptic_phenomenon

[–] [email protected] 4 points 7 months ago

That's a different phenomenon from the picture. The picture shows a body in the vitreous jelly. The article you linked is a "brain filling in gaps" phenomenon.

Still, very cool article. I had never read about that.

[–] [email protected] 3 points 7 months ago
[–] [email protected] 2 points 7 months ago

I see that sometimes when I cough or sneeze too hard.