Iris to mask to eyeball shape

[kirstenv84241232]

Hello. I'm farily new to character animator and photoshop.  I've an eyeball shape, an iris shape, and a pupil shape. I've grouped iris and pupil to a pupil group and they move just fine. No eye lids. Eyeball shape is oval and iris shape is circle. I want the iris to show through the eyeball rather than the entire circle sitting on top of the oval shape. I'm trying to find masking tips, but am not having any luck. Any tips?

[alank99101739]

There is a mask feature you can use to do this. https://extra-ordinary.tv/2018/04/21/debugging-character-animator-eyess/ 

If the blog does not explain it, feel free to ask follow up questions.