The iris is on the surface of the eye, like a dot on a soccer ball. It foreshortens and appears to narrow as the eye turns away from us.
If you draw irises as perfect circles from every angle, the eyes will look cartoony, like cookie monster's eyes.
Guys I have a confession to make... I wear pants pretty much every day now. It started so innocently with pajamas and pjorts but I’ve really changed I’m so sorry