Post History
This is an addition to Willk's answer; Giant pupils would be a very good start, with the addition that the iris would have to be able to get the pupil small enough to allow function in the dayligh...
Answer
#1: Attribution notice removed
by
System
·
2021-03-30T23:53:20Z (almost 4 years ago)
Source: https://worldbuilding.stackexchange.com/a/149240 License name: CC BY-SA 4.0 License URL: https://creativecommons.org/licenses/by-sa/4.0/