I'm currently trying to contact College of Optical Sciences at the University of Arizona for the detailed information about the program, as I'm interested in Optical Sciences mostly. Somehow (they say it's hereditary), it happened so that I have a poor eyesight, so I've got used to the lenses since the age of 5.
Have you contacted any universities yet?
Last week I sent an email to UCF (concerning their Optics and Photonics PhD program). Here's the list of unis with PhD in optics/photonicshere
on Quora (I've started from those).