What are cataracts in dogs and how are they treated?
Cataracts in dogs are a clouding of the lens inside the eye, causing progressive vision loss. The condition ranges from a small opacity with minimal impact to complete blindness. Surgical removal of the affected lens is the only proven treatment that restores vision. Non-surgical approaches can slow secondary complications but cannot reverse the opacity.
MaxPetz in Delhi provides veterinary eye care and surgical services for dogs diagnosed with cataracts, combining clinical assessment with compassionate, technology-supported care for your pet.
Key fact: Cataracts are distinct from nuclear sclerosis — a normal age-related haziness that does not significantly impair vision and does not require surgery. A veterinary examination is needed to tell them apart.
What are the early signs of cataracts in dogs?
Cataracts often develop gradually. Owners may notice subtle changes before significant vision loss occurs. Early detection improves surgical outcomes, so knowing what to look for matters.
- Bluish, grey, or white cloudiness visible in one or both eyes
- Reluctance to navigate stairs, jump, or move in low light
- Bumping into furniture or walls, especially in unfamiliar environments
- Increased clumsiness or hesitation when fetching or playing
- Eye redness, squinting, or apparent discomfort
- Pupils that appear unequal in size or do not respond normally to light
- Rubbing or pawing at the eyes
These signs do not confirm cataracts on their own — several other eye conditions share similar presentations. A veterinary ophthalmic examination is required for an accurate diagnosis.
What are the stages of dog cataracts?
Cataracts in dogs are classified by the extent of lens involvement. Understanding the stage helps determine urgency of treatment.
| Stage | Lens Involvement | Vision Impact |
|---|---|---|
| Incipient | Less than 15% of lens | Minimal — dog usually functions normally |
| Immature | 15–99% of lens | Partial vision loss; some light perception remains |
| Mature | 100% of lens | Complete blindness in the affected eye |
| Hypermature | Lens begins to liquefy | Blindness; high risk of secondary glaucoma and uveitis |
Surgery is most successful when performed at the immature or mature stage, before secondary complications such as lens-induced uveitis or glaucoma develop.
What causes cataracts in dogs?
Cataracts in dogs have several recognised causes. Identifying the underlying cause helps guide treatment and long-term management.
- Hereditary / genetic: The most common cause in dogs. Breeds including Labrador Retrievers, Golden Retrievers, Poodles, Cocker Spaniels, and Boston Terriers carry a higher genetic predisposition.
- Diabetes mellitus: Diabetic dogs have a significantly elevated risk; the altered glucose metabolism disrupts lens clarity.
- Age-related changes: Older dogs may develop cataracts as part of natural lens ageing, distinct from nuclear sclerosis.
- Trauma: Penetrating eye injuries can trigger localised or diffuse lens opacification.
- Nutritional deficiencies: Puppies fed nutritionally incomplete diets may develop cataracts early in life.
- Uveitis or other ocular disease: Chronic inflammation inside the eye can secondarily affect the lens.
- Radiation or toxic exposure: Less common; associated with specific environmental or medical exposures.
How is cataract surgery performed in dogs?
The standard surgical procedure for canine cataracts is phacoemulsification — the same technique used in human cataract surgery. A veterinary ophthalmologist uses ultrasonic energy to break up and remove the cloudy lens, then implants an artificial intraocular lens (IOL) to restore focusing ability.
- Pre-operative assessment: Electroretinography (ERG) confirms the retina is functional before surgery is scheduled. Blood work and a general health screen assess anaesthetic fitness.
- Anaesthesia: The dog is placed under general anaesthesia. Intraocular pressure and vital signs are monitored throughout.
- Phacoemulsification: A small incision is made in the cornea. An ultrasonic probe emulsifies the lens material, which is then aspirated from the eye.
- IOL implantation: An artificial lens is inserted into the lens capsule to restore near-normal vision.
- Post-operative care: Topical and systemic anti-inflammatory medications are prescribed. An Elizabethan collar is worn to prevent self-trauma. Follow-up examinations monitor healing and intraocular pressure.
Warning: Delaying surgery until cataracts become hypermature significantly increases the risk of lens-induced uveitis and secondary glaucoma, which can permanently damage the eye and reduce the likelihood of a successful surgical outcome.
Dogs that are not surgical candidates — due to retinal disease, advanced glaucoma, or systemic illness — require ongoing medical management to control inflammation and monitor for complications, rather than surgery.
When should you bring your dog to a vet for eye concerns?
Seek a veterinary examination promptly if your dog shows any of the following. Early intervention preserves more treatment options.
- Visible cloudiness or colour change in one or both eyes lasting more than a few days
- Sudden behavioural changes such as reluctance to go outdoors at night or increased anxiety in new spaces
- Any eye redness, discharge, or squinting that persists beyond 24–48 hours
- A confirmed diagnosis of diabetes mellitus — diabetic dogs should have routine eye examinations even without visible symptoms
- A known breed predisposition to hereditary cataracts — annual ophthalmic screening is advisable from middle age onward
- Any history of eye trauma, regardless of whether cloudiness is visible immediately
Do not wait for complete vision loss before consulting a vet. Cataracts at the immature stage respond better to surgery than those that have progressed to mature or hypermature.
How does MaxPetz Delhi support dogs with cataracts?
MaxPetz in Delhi offers veterinary surgical services and comprehensive eye care for dogs, supported by cutting-edge technology and a team focused on compassionate, evidence-based treatment. From initial ophthalmic assessment through pre-surgical screening and post-operative follow-up, the clinical approach at MaxPetz is structured around your dog's individual health status and stage of disease.
For dogs with canine eye surgery needs, the team coordinates diagnostics, anaesthetic planning, and aftercare in one place — reducing the stress of navigating multiple referral centres. Owners are guided through every stage of the cataract surgery procedure and recovery protocol so they can support their pet's healing at home with confidence.
Book a consultation at MaxPetz Delhi
Use the booking form on this page to schedule an ophthalmic assessment for your dog.