What type of doctor should my Mom see for going blind in one eye? Possible TIA...

Jenna, depending on the results of the ER exam, if your mother is still in need of eye examination, there may be some clinics in the area.   E.g., the Kresge Eye Clinic in Detroit was affiliated with a teaching hospital. 

A lot has changed since that time so I don't know whether or not the hospital and the Clinic are still affiliated, but from my limited experience with a neighbor whose husband had complex eye issues, he spent  a lot of time in the Clinic, undergoing complicated procedures during diagnostic attempts.

I hope that whatever is diagnosed can be controlled and that your mother is stabilized when you return from the ER.    Please continue to give us updates?

Yes, take her to the ER, they are equipped to do scans and to determine the best specialist whatever the underlying cause is.

Yes, if Ophthalmologist cannot see you right away you should go right to the ER. When I had something where it was like a shade being slowly pulled down my eye I went right away, they did thorough exam, and sent me for MRI, said could be stroke. Wasn't, and never happened again, knock wood. That was eight years ago.
This would be EMERGENT care even if just the eye symptom. But as there is the other she will likely go from there straight to neuro. There will be a doppler test done on the carotids. If it is TIAs then to prevent a stroke they will likely want to do a carotid endarterectomy. But first comes diagnosis. The opthalmologist may send Mom, after negative exam, straight to ER or to her doctor for emergent care clinic.
I would go to ER in this case. Like NOW.

I would say a neurologist. My Mom tended to walk to the left. I brought it to her neurologist's attention. He had her eye doctor run some tests. It was found she had no TIAs but she had lost her peripheral vision in her left eye probably caused by the Dementia.

I do need to say, having cataracts done does not mean u stop going to an eye doctor. The lens need to be checked regularly. You are still susceptible to deseases such as glocoma. A good eye doctor, MD, will find things wrong with an eye in the early stages before they cause damage.

Jenna, I would see a neurologist and a retinologist to get her eyes checked. Tell them (retinal doc) it is an emergency, they will usually get you in because time is of the essence for treatment. Call the eye doc 1st.

Best of luck getting her treated. I pray that she is okay, you too.

Yes, an ER trip is in order because of the stroke potential.

Your mom may have a blockage in her carotid artery. Please get her to the ER.

Edited to add: This happened recently to my ex-MIL while she was driving.