I did bring up the possibility of it being a neurological problem with the vet, especially with her traveling in reverse. He observed her movement and said it did not look typical of a neurological issue. She moves forward easily and navigates pretty well, especially if the surface is warmer or colder than the ambient air. She just bumps into room temperature surfaces and changes direction accordingly.

Being that the veterinarian was confident it was bug eyes and she doesn't have symptoms of anything else, I'm agreeing with his diagnosis.