>>7642371
i still feel pretty /beg/ so i'm not the best to talk about it i think, but as the head rotates the eye rotating further out of view should remain about as tall, but not as a wide, unless there's some serious perspective happening
i have a few little practice examples at the top of this picture that i hope give an idea. i think it's easier with more semi-realistic eyes compared to the typical anime-style eyes you might see that are almost like a rhombus in shape, which gets really weird when trying to alter as it rotates away from the viewer