this post was submitted on 22 May 2025
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398
Infrared contact lenses let you see in the dark (arstechnica.com)
submitted 1 day ago by will_a113@lemm.ee to c/technology@lemmy.world
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[–] darklamer@lemmy.dbzer0.com 4 points 1 day ago (1 children)

… and don't have eyes!

[–] hsdkfr734r@feddit.nl 2 points 1 day ago* (last edited 1 day ago) (1 children)

Yes. Light receptors maybe, but eyes...

source

... and light-sensing organs called ocelli, which can sense the presence and absence of light. Additionally, some jellyfish have sensory structures called rhopalia, which contain receptors to detect light, chemicals and movement.

Oh wait! This is unexpected:

... One group of jellyfish, the cubozoan jellyfish, have complex eyes... with lenses, corneas and retinas in their rhopalia.

Huh. Wiki agrees:

box jellyfish are unique in the possession of true eyes, complete with retinas, corneas and lenses.[13] Their eyes are set in clusters at the ends of sensory structures called rhopalia

Whoa.

[–] darklamer@lemmy.dbzer0.com 2 points 1 day ago

WTF!? [subscribe to jellyfish facts]