this post was submitted on 11 Apr 2025
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[–] Umbrias@beehaw.org 0 points 3 months ago (5 children)

many eyes are near the diffraction limit (for human sized eyes the diffraction limit is around 20/10 vision). To have better accuity you factually need larger eyes. Although it's the size of the lens that matters more than pupil size strictly. The pupil modifies the lens optics but the lens determines the limit.

[–] OfCourseNot@fedia.io 0 points 3 months ago (4 children)

What if the refractive index of elvish eyes were somehow absurdly high? Paired with a very high resolution and sensitivity retina of course.

[–] Umbrias@beehaw.org 0 points 3 months ago (3 children)

the diffraction limit of a lens cant really be circumvented optically, it's a fundamental limit of light due to being waves. so some insane refractive index wont help.

[–] OfCourseNot@fedia.io 0 points 3 months ago

Aye but light, being a wave, doesn't travel at the same speed in every medium. In a high refractive index media the wavelengths of visible light would be shorter. Would this not reduce the effect of diffraction on them for normal-sized pupils?

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