Ocular Disease in Bernese Mountain Dogs

Do this once a month in daylight and it takes under a minute. The value is not in diagnosing anything but in noticing change, because you are the only person who sees these eyes every day.

Progressive retinal atrophy appears explicitly on the Bernese Mountain Dog's documented health issue list. It is a gradual degeneration of the light-sensing layer at the back of the eye, and it is painless and untreatable. It typically begins with difficulty in dim light, so the earliest owner observation is usually a dog who becomes hesitant on evening walks or bumps into things in a poorly lit hallway. It progresses to full blindness over months to years, and because it is inherited, breeders screen for it.

Cataracts are the second common concern. The lens becomes opaque, and vision reduces in proportion to how much of the lens is affected. Some are inherited, some develop with age, and some accompany diabetes. Unlike retinal degeneration, cataracts can sometimes be treated surgically, which is why the distinction matters rather than being academic.

Eyelid conformation problems occur across many breeds. Lids that roll inward cause lashes and hair to rub the cornea constantly, producing chronic irritation and eventually ulceration. Lids that sag outward expose the surface and trap debris. Both are surgically correctable and both are worth catching early.

Corneal ulcers are surface injuries and are the most common genuinely urgent eye problem. A dog who suddenly starts squinting and tearing, holding one eye half shut, has usually damaged the corneal surface, and these can deepen alarmingly fast.

Glaucoma, a rise in pressure inside the eye, is the condition that most justifies urgency. It is intensely painful and can destroy vision within a day or two.

If you think your Bernese has ocular disease, the plan is three steps: write down what you have seen and when it started, book a veterinary appointment rather than waiting for the next flare, and take video of the behaviour or symptom before you go — the thing you are worried about rarely happens in the consulting room. Screening in the parents covers hip dysplasia, elbow dysplasia, bloat (gdv).

What the vet visit should produce is a diagnosis and a written plan, not just reassurance: what is being ruled out, what the monitoring interval is, and which signs mean you come back sooner. Ask what the treatment costs across a year rather than per visit, because that is the number that decides whether you are managing this condition or reacting to it.

Between appointments, keep a short log — dates, what you saw, what changed. It is the single most useful thing an owner brings to a follow-up, and for ocular disease it is often what separates a clear pattern from a guess.