
One of my family's elkhounds was affected by glaucoma many years ago (completely different lines to what we are working with now). It started in one eye, but soon affected both. It is my understanding that primary glaucoma (the inherited type) always does. The eye takes on a characteristic blueish hue, sort of glassy looking - literally, glaucous. The whites are typically bloodshot. As the disease advanced, it appeared at times that Scuti's eyes were enlarged by the pressure. It is very painful. My mother saw it in one other dog after that, and recognised it straight away from that glassy appearance.
Scuti's eyes were not removed, but her litter sister, who was also affected, lost hers, and coped rather better. These days, I'm told treatments are far more effective, and the prognosis is not so bleak. If it's confirmed as primary glaucoma, treatment started immediately may help preserve the other eye. The type of glaucoma in elkhounds is not precisely the same as that in American cockers, and the exact cause is unknown, although it is likely to be inherited, probably as Polly says as a polygenic. Two would be young in elkhounds, as it typically shows up at around five or six years of age, but maybe cockers develop symptoms earlier?
I wouldn't try to second guess a diagnosis, or worry too much right now. The eye specialist will be able to tell you if that's what it is, as glaucoma will show changes to the eye which can be picked up, for example, in the optic nerve.