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Pretty funny video on the subject https://youtu.be/CXWzpKYXRXM

I presume it would make your pupils look super dilated, which could have all sorts of fun implications...

It'd probably just make you look like you have darker eyes.

Shades of A Gift From Earth there. Good novel.

When you are outside in bright sunlight, your pupils will constrict, so that only a small part of the lens actually needs to darken.

Is there a reason the entire lens has to darken? If they only deposited the dye in a smaller center portion, it would be unnoticeable against a black pupil.