I had laser surgery once while on H and the difference between my pupils was a sight to behold.There are eyedrops which dilate the pupil for retina examination, I think these are based off belladonna (these are even named after the effect, in past times huge pupils were seen as beautiful lol) alkaloids which are pretty dangerous to mess with but I guess the correct dosage could counter pupil constriction.
You can get contacts that make your eyes look how ever you want. They can be irritating on ecstasy but I doubt you'll notice on opioids