Cataract surgery for a dog costs roughly $2,700 to $6,000 for both eyes, including the pre-operative testing, surgery, lens implants and the first months of follow-up. A single eye typically runs $1,800 to $3,500. Doing both at once is markedly cheaper than doing them separately, since it is one anaesthetic.
The procedure is phacoemulsification — the same operation performed in people. A tiny incision is made, ultrasound breaks up the cloudy lens, the fragments are removed, and an artificial lens is placed in the remaining capsule. It usually takes under an hour per eye and your dog goes home the same day.
Most owners are surprised this exists at all. It does, it works well, and it is one of the more reliably successful procedures in veterinary medicine.
If your dog is diabetic, read this part first
Cataracts develop in the large majority of diabetic dogs, and often fast — many owners describe an eye going from clear to white within days to weeks. High blood glucose draws water into the lens, and the lens swells and clouds.
Two things follow.
Speed matters. A rapidly forming diabetic cataract can swell enough to rupture the lens capsule, causing severe inflammation and, sometimes, glaucoma. That takes a straightforward surgical candidate and turns them into a poor one. If your diabetic dog's eyes are clouding, get a referral now rather than at the next diabetic recheck.
Diabetes is not a barrier. Diabetic dogs are among the best candidates for this surgery, provided the diabetes is reasonably regulated first.
Cats get cataracts far less often, and when they do it is usually secondary to inflammation inside the eye — so the underlying cause matters more than the cataract.
The test that decides everything
Before surgery your ophthalmologist will perform an electroretinogram (ERG) and an ocular ultrasound. Together these cost several hundred dollars, and owners frequently resent them.
They are the most important part of the whole process.
A cataract is an opaque lens — a dirty window. Behind the window is the retina, and if the retina is not working, replacing the window changes nothing. Retinal degeneration (PRA) and cataracts often occur in the same dog, and there is no way to see the retina through a dense cataract.
The ERG measures whether the retina responds to light. The ultrasound checks it is still attached. If either says no, surgery is cancelled — and you have saved several thousand dollars on an operation that could not have restored sight.
Understood that way, the pre-operative testing is not an added cost. It is the thing that stops you wasting the main one.
Success rates, honestly
Vision is restored in the large majority of eyes — commonly quoted as around 90–95% success in the immediate post-operative period, falling somewhat over the following years as complications accumulate.
The complications that matter:
- Glaucoma — the most serious, and the commonest reason an eye is eventually lost.
- Retinal detachment — uncommon, usually early.
- Posterior capsular opacification — the capsule holding the lens clouds again. Usually mild in dogs.
- Persistent inflammation, which is why the medication schedule is what it is.
Prognosis is best for early cataracts in otherwise healthy eyes and materially worse for hypermature ones, where the lens has been degenerating long enough to cause chronic inflammation. That is the strongest argument against waiting.
The part owners underestimate: the drops
This is where the surgery actually succeeds or fails, and it has nothing to do with the surgeon.
Expect multiple different eye drops, several times a day — often four to six administrations daily in the early weeks — tapering over two to three months, with some dogs on long-term drops. Plus oral anti-inflammatories, an Elizabethan collar for two weeks, restricted activity, and rechecks at one day, one week, one month and beyond.
Non-compliance is a leading cause of failure. If you travel a lot, work long shifts, or have a dog who is genuinely impossible to medicate, say so before surgery rather than after. Your ophthalmologist would far rather know.
There is no drop that dissolves a cataract
This needs saying directly, because the products are marketed hard to exactly the people reading this page.
Lanosterol, carnosine (N-acetylcarnosine), and the various "cataract dissolving" drops sold online do not have evidence supporting their use in dogs. Early laboratory work generated headlines; clinical results have not followed. The American College of Veterinary Ophthalmologists does not recommend them.
Surgery is the only treatment that removes a cataract. Anything else either does nothing or delays the point at which the eye is still a good surgical candidate.
If surgery is not an option
A dog blind from cataracts, whose retina has failed, or whose owner cannot fund surgery, can live a genuinely good life. Dogs navigate primarily by smell and hearing. Keep furniture where it is, use scent and texture markers, block stairs and pools, and talk before touching.
Blindness is a much smaller loss to a dog than it is to a person, and choosing not to operate is not a failure of care.
Who isn't a candidate
- Other: A retina that is not working — an electroretinogram is performed before surgery, because removing a cataract in front of a detached or degenerate retina restores no vision at all.
- Other: Uncontrolled diabetes; the disease must be regulated before surgery, though diabetes itself is not a barrier and diabetic dogs are among the best candidates.
- Other: Active uveitis or glaucoma, which are treated first and which worsen the prognosis if present at the time of surgery.
- Other: An owner who cannot commit to the medication schedule — multiple eye drops several times daily for weeks, tapering over months. Non-compliance is a leading cause of failure.
- Concurrent condition: A long-standing hypermature cataract, where lens-induced inflammation has already damaged the eye, has a materially poorer outcome than an earlier one.
Common questions
How much does cataract surgery cost for a dog?
Roughly $2,700 to $6,000 for both eyes including pre-operative testing, surgery, lens implants and early follow-up. A single eye runs $1,800 to $3,500 — doing both in one anaesthetic is considerably cheaper than two separate procedures. Budget also for the electroretinogram and ocular ultrasound, and for two to three months of medication.
What is the success rate of cataract surgery in dogs?
Vision is restored in around 90–95% of eyes in the immediate post-operative period, declining somewhat over subsequent years as complications accumulate — glaucoma being the most serious. Results are best for early cataracts in otherwise healthy eyes and meaningfully worse for hypermature ones, where prolonged lens degeneration has already inflamed the eye.
Do diabetic dogs get cataracts?
The large majority do, often within the first year of diagnosis and sometimes over days to weeks. High blood glucose draws water into the lens. Speed matters because a rapidly swelling cataract can rupture the lens capsule and trigger severe inflammation or glaucoma, turning a good surgical candidate into a poor one. Diabetes itself does not prevent surgery.
Are there eye drops that dissolve cataracts in dogs?
No. Lanosterol, carnosine and similar products marketed online do not have evidence supporting their use in dogs, and the American College of Veterinary Ophthalmologists does not recommend them. Surgery is the only treatment that removes a cataract, and relying on drops can delay referral past the point where the eye is still a good candidate.
Is cataract surgery worth it for an older dog?
Age alone is not a barrier — eye health and general anaesthetic fitness matter more. The deciding test is the electroretinogram, which shows whether the retina still works; if it does not, surgery cannot restore sight and should not be done. The other real question is whether you can commit to weeks of frequent eye drops, since non-compliance is a leading cause of failure.
Sources
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