Oof. I'm not sure how to make it more central than it already is... Google Drive Link below - I'd love for you to take a look. Thanks for your time I really appreciate it!
https://drive.google.com/file/d/14Vs3NCDRchvlfVXtdu13EwWEjklrB4gS/view?usp=sharing
Okay, I think the problem was with the original Photoshop file. When I selected each part of the eye, it was showing the entire mesh and not just the eye. So I selected just the object in PS and inverted the selection (shift+ctrl+I) and deleted EVERYTHING that was outside of the selection. I did that for the blink, the pupil and the eyeball. I saved the file, re-imported it, and it started working. I'll attach the file so you can get back to work with it.
https://drive.google.com/file/d/1ewEWdF215vvmXVKfycOnryCu4pEGysP3/view?usp=sharing
Also, when I re-imported the file, the origin points for the eyebrows and pupils were off. This image shows where the origin point is meant to be. 