If therapy for your pet’s glaucoma fails, understand that vision loss is not life threatening, and the vast majority of animals adjust very well to impaired vision or blindness. It is all a question of whether you as their human is able to adjust.
As with many diseases, pet glaucoma is not preventable, but it is highly treatable if caught in its early stages, so make sure you take your pet for regular check ups, and observe any changes in the appearance of the eye, behavior (bumping into things, shaking the head, not responding to you) or mood (agitated or lethargic and seemingly uninterested in things it would normally pay attention to).
You are your pet’s first line of defense against disease, so take time every day to bond with your pet with brushing or petting and look at their eyes every day. And who can resist them anyway!