this post was submitted on 25 Sep 2024
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[โ€“] Donut@leminal.space 51 points 2 months ago (2 children)

From the first source on the linked study, they describe it as the following:

(...) This functions as a mirror providing the second opportunity for photon capture by reflecting light back through the retina, enhancing visual sensitivity.

But the iris is a mask, it blocks off axis light