Vivid well this will be totally, totally spculation as we've not even seen em yet, just a hinting of them coming.
Given that, I cant help but start to think how that will he enacted.

Given that clear doesn't seem to be a separate trait but comes from 2 parents with the same color eye
Given that 2 clear eyes seem to have only rare instances of not producing clear

My speculation would lead me to think that I better start saving up my clear nests to breed the same color clears together.
Do we think it might be that easy? No idea. But might make sense from an implementation perspective. Hopes to be able to find out soon!!
Coarse I realize that alot are already pairing clear eye of the same color to each other and getting more clear eyes and we haven't seen this yet so suspect it may not be quite this easy. Damn you, Levio. Toss me a bone here. Just one thing I can actually achieve, huh.