Help! My Dog Has Cataracts

Updated June 6, 2021

‘At A Glance (Details Below)’ Essential Facts

If A Dog Has A Cataract

  1. Don’t panic: most of what are called ‘cataracts’ are part of normal ageing
  2. To check for true cataracts you need to see either a vet or an eye specialist
  3. Senile lenticular sclerosis does not cause blindness and needs no treatment, whereas cataracts require removal to restore vision

Now dive deeper.

Is It A Cataract?

Many owners of older dogs with hazy eyes  get told that their dog has cataracts, and then live in fear of their dogs going blind. The truth is most of these dogs have nothing of the sort.  After reading this, you can be the one to correct the next giver of bad advice.

dog lenticular sclerosis
Not a cataract By Joel Mills (Own work) [GFDL, CC-BY-SA-3.0], via Wikimedia Commons

Cataracts do happen in dogs and are probably at least as common as in people. When they occur they are very important, both as common causes of bindness and signs of other important diseases such as diabetes and progressive retinal atrophy (PRA).

However, the vast majority of dogs said to have a cataract instead have ‘senile nuclear sclerosis’ (or lenticular sclerosis). This is the condition which proves to me more than any other that we are not supposed to live forever.

What Is Senile or Lenticular Sclerosis?

As we age, our lenses continue to create new layers from the inside of their capsule. This creates an onion-like effect, with older layers moving towards the centre. The problem is that despite the new lens material being produced on the edge, the lens cannot get any bigger. Therefore, the lens becomes more and more dense in its centre, or nucleus.

By about 8 years of age, this dense nucleus starts getting visible, and as the dog ages it reflects more light, giving the dog’s eyes a bluish-grey look as in the picture above.  The trick is that most light still goes straight through as normal and the dog’s sight is hardly affected if at all.

What Does A Cataract look Like?

dog eye cataracts
True cataracts in a dog

It only takes a quick visit for a vet to tell the difference by seeing if the retina is visible (as in nuclear sclerosis) or not (as in the cataracts seen here). You can also see in this picture of mature cataracts how the lens has irregularities and it much whiter than the earlier picture.

If you are concerned by advice from others about your dog’s eyes having cataracts, please don’t lose sleep as it is much more likely that they are wrong. However, do make an appointment with your vet just to be sure. Cataracts eventually cause blindness but can be removed by a vet eye specialist to restore vision. That’s what the pictured dog had after this photo.

Importantly, cataracts caused by diabetes need to be treated very early before they swell up and rupture their capsules. This can lead to severe uveitis and an inability to implant the new lens.

What Happens When Dogs Go Blind?

Another myth worth tackling is that a dog going blind is a big problem. Most owners don’t notice their dog’s blindness, and the dogs don’t seem to mind as long as they can sniff their way through the day.

If all this sounds a bit blasé, try to see the world from a dog’s point of view. Unlike humans, vision is probably their third most important sense. If you really feel like messing with your mind, read more here on this concept of ‘umwelt’. It might just change how you see animals!

Have something to add? Comments (if open) will appear within 24 hours.
By Andrew Spanner BVSc(Hons) MVetStud, a vet in Adelaide, Australia. Meet his team here. The information provided here is not intended to be used as a substitute for going to the vet. If your pet is unwell, please seek veterinary attention.

9 Replies to “Help! My Dog Has Cataracts”

  1. This is the best blog was concerned about my little poodle Belle but now happier she’s about 14 thankyou Vikki

  2. Thx for this info. I was confused with my dog bc I thought she was getting cataracts but then can catch the smallest treat with no problems. Now it makes sense.

  3. My dog is now clocking up to 11 years old, otherwise has been healthy although recent months she’s had this glare over here eyes although her vision seems perfect, she looks as though she has the early onset of cataracts.
    What are symptoms of diabetic dogs please?

    1. Hi Chris. Diabetes is associated with increased appetite and thirst in the early stages as well as weight loss.

  4. My dog is a 5 year old Old English Sheepdog with thyroid issues (controlled by medication) and diabetes (also controlled by insulin). He seems to have gotten cataracts overnight. Our vet said even though its cataracts, he can still see shadows. However, he is running into things and cannot see me if Im sitting still and just silently waving at him. Is this normal for cataracts or is he going blind? And can this be corrected? Please help, Im a mess!

    1. Hi Lisa. Sadly, cataracts are very common in diabetic dogs. They often come on quickly and typically lead to blindness. The only glimmer of hope is that they can be operated on by veterinary ophthalmologists, though here in Australia it costs several thousand dollars to do so. Otherwise, dogs do cope well but it’s hard on them to lose vision so quickly.

  5. My dog is 3 years old and i took him to the vet and one of his eye has Cataract.. How worry should i be and should he get surgery to remove it?
    Jack russell

    1. Hi Andre- that’s very unusual in such a young dog. It’s certainly something I would get checked by a vet eye specialist. The decision on whether to operate will depend on what is causing the cataract and what the chances are of the other eye having the same problem. If it’s only one eye, a dog will do just fine without surgery.

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