28 Jul 2026

Cataracts in Dogs: Signs, Progression, and Surgical Options

MaxPetz 7 min min read
Cataracts in Dogs: Signs, Progression, and Surgical Options

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.

StageLens InvolvementVision Impact
IncipientLess than 15% of lensMinimal — dog usually functions normally
Immature15–99% of lensPartial vision loss; some light perception remains
Mature100% of lensComplete blindness in the affected eye
HypermatureLens begins to liquefyBlindness; 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.

  1. Pre-operative assessment: Electroretinography (ERG) confirms the retina is functional before surgery is scheduled. Blood work and a general health screen assess anaesthetic fitness.
  2. Anaesthesia: The dog is placed under general anaesthesia. Intraocular pressure and vital signs are monitored throughout.
  3. Phacoemulsification: A small incision is made in the cornea. An ultrasonic probe emulsifies the lens material, which is then aspirated from the eye.
  4. IOL implantation: An artificial lens is inserted into the lens capsule to restore near-normal vision.
  5. 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.

FAQs

  • Your vet will assess the stage of the cataract, the degree of vision loss, and whether the retina is still functional using electroretinography. Surgery is generally recommended for immature or mature cataracts in otherwise healthy dogs. If secondary complications such as uveitis or glaucoma are already present, the prognosis changes. Use the booking form on this page to arrange an assessment at MaxPetz Delhi.
  • No eye drop or oral medication can reverse or dissolve an established cataract in dogs. Non-surgical management — including anti-inflammatory eye drops — can help control lens-induced uveitis and slow secondary damage, but it does not restore vision. Surgery (phacoemulsification) remains the only treatment that can return functional sight to an affected eye.
  • Many dogs adapt well to partial or even complete vision loss, particularly in familiar environments. However, untreated mature cataracts carry a risk of painful secondary complications including glaucoma and uveitis. Dogs with bilateral cataracts and no surgical option benefit from environmental modifications and regular veterinary monitoring to manage discomfort and quality of life.
  • Age of onset depends on the cause. Hereditary cataracts can appear in dogs as young as one to two years old in predisposed breeds. Diabetic cataracts can develop rapidly at any age once diabetes is diagnosed. Age-related cataracts are more common in dogs over seven years. Annual eye checks are advisable for breeds with a known genetic predisposition.
  • Phacoemulsification is a well-established procedure in veterinary ophthalmology. As with any surgery requiring general anaesthesia, there are risks, which are assessed individually based on the dog's age, overall health, and eye condition. Pre-operative screening — including blood work and electroretinography — is performed to identify and minimise risk before proceeding.
  • The cost of canine cataract surgery in India varies depending on whether one or both eyes are treated, the pre-operative diagnostics required, the type of intraocular lens implanted, and post-operative care needs. For a detailed estimate based on your dog's specific condition, please use the booking form on this page to speak with the MaxPetz Delhi team.
  • Your vet will assess the stage of the cataract, the degree of vision loss, and whether the retina is still functional using electroretinography. Surgery is generally recommended for immature or mature cataracts in otherwise healthy dogs. If secondary complications such as uveitis or glaucoma are already present, the prognosis changes. Use the booking form on this page to arrange an assessment at MaxPetz Delhi.
  • No eye drop or oral medication can reverse or dissolve an established cataract in dogs. Non-surgical management — including anti-inflammatory eye drops — can help control lens-induced uveitis and slow secondary damage, but it does not restore vision. Surgery (phacoemulsification) remains the only treatment that can return functional sight to an affected eye.
  • Many dogs adapt well to partial or even complete vision loss, particularly in familiar environments. However, untreated mature cataracts carry a risk of painful secondary complications including glaucoma and uveitis. Dogs with bilateral cataracts and no surgical option benefit from environmental modifications and regular veterinary monitoring to manage discomfort and quality of life.
  • Age of onset depends on the cause. Hereditary cataracts can appear in dogs as young as one to two years old in predisposed breeds. Diabetic cataracts can develop rapidly at any age once diabetes is diagnosed. Age-related cataracts are more common in dogs over seven years. Annual eye checks are advisable for breeds with a known genetic predisposition.
  • Phacoemulsification is a well-established procedure in veterinary ophthalmology. As with any surgery requiring general anaesthesia, there are risks, which are assessed individually based on the dog's age, overall health, and eye condition. Pre-operative screening — including blood work and electroretinography — is performed to identify and minimise risk before proceeding.
  • The cost of canine cataract surgery in India varies depending on whether one or both eyes are treated, the pre-operative diagnostics required, the type of intraocular lens implanted, and post-operative care needs. For a detailed estimate based on your dog's specific condition, please use the booking form on this page to speak with the MaxPetz Delhi team.

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