Cataracts in Cows

Quick Answer
  • A cataract is a cloudy lens inside the eye, not a surface film on the cornea.
  • Some cattle have mild cataracts and still function well, while dense cataracts can reduce vision or cause blindness.
  • Congenital cataracts can be inherited in some cattle lines, including Holstein-Friesian and Jersey cattle, and cataracts can also occur with in-utero bovine viral diarrhea exposure.
  • A white or blue-looking eye is not always a cataract. Pinkeye, corneal ulcers, scarring, uveitis, and trauma can look similar and may need faster treatment.
  • If your cow has eye pain, squinting, tearing, redness, or sudden vision loss, see your vet promptly.
Estimated cost: $75–$350

What Is Cataracts in Cows?

A cataract is an opacity in the lens inside the eye. The lens should be clear so light can reach the retina. When it turns cloudy, vision becomes blurred, dim, or absent depending on how much of the lens is affected.

In cattle, cataracts may be present at birth, develop early in life, or appear later as a spontaneous change or after inflammation, trauma, or other eye disease. Merck Veterinary Manual notes that spontaneous cataracts are not uncommon in cattle, but complete blindness from them is considered uncommon. That said, even a single blind eye can matter in calves, breeding animals, and cattle that need to move safely through handling systems.

For pet parents and producers, the tricky part is that many eye problems look alike from a distance. A cataract is inside the eye, while pinkeye and corneal ulcers affect the eye's surface. Because treatment options and urgency are different, your vet needs to determine exactly where the cloudiness is coming from.

Symptoms of Cataracts in Cows

  • White, gray, or pearly opacity seen through the pupil
  • Reduced vision, especially in dim light or unfamiliar areas
  • Bumping into gates, feeders, or fencing
  • Startling easily when approached from the affected side
  • Reluctance to move through chutes or uneven footing
  • One eye appearing different from the other
  • Squinting, tearing, redness, or obvious pain
  • Sudden cloudiness after injury or severe eye inflammation

Mild cataracts may cause no obvious signs at all. Some are found only when your vet examines the eye closely. More advanced cataracts can make cattle hesitant, easier to spook, or less willing to navigate new spaces.

When to worry: see your vet sooner if the eye is painful, red, tearing, swollen, or suddenly cloudy. Those signs can point to pinkeye, corneal ulceration, uveitis, glaucoma, or trauma, which may be more urgent than an uncomplicated cataract.

What Causes Cataracts in Cows?

Cataracts in cows can be congenital, inherited, or acquired later in life. Merck Veterinary Manual lists heritable cataracts in cattle, including Holstein-Friesian and Jersey cattle. In these cases, the lens develops abnormally and the cloudiness may be noticed in a calf or young animal.

Another important cause is in-utero infection with bovine viral diarrhea virus (BVDV). Merck notes that calves exposed before birth can develop eye defects including microphthalmia, cataracts, retinal dysplasia, and retinal detachment. BVD-related cataracts are often part of a broader congenital problem rather than an isolated eye issue.

Acquired cataracts can also follow intraocular inflammation, trauma, radiation exposure, or nutritional and metabolic disturbances. In the field, cattle with a cloudy eye are often first suspected to have pinkeye or corneal scarring, so your vet may need to sort out whether the opacity is in the lens, cornea, or deeper structures.

Sometimes no single cause is confirmed. A cow may have a spontaneous cataract that stays stable for years, or a cataract may progress over time. The likely cause matters because it affects prognosis, breeding decisions, and whether herd-level prevention steps are worth discussing.

How Is Cataracts in Cows Diagnosed?

Diagnosis starts with a careful history and a hands-on eye exam. Your vet will ask when the cloudiness was first noticed, whether vision seems affected, whether one or both eyes are involved, and whether there has been trauma, pinkeye, or illness in the herd. In calves, they may also ask about the dam's health and vaccination history during pregnancy.

The exam usually includes checking menace response and navigation, inspecting the cornea and pupil, and using a bright focal light or ophthalmoscope to determine whether the opacity is actually in the lens. A fluorescein stain may be used to rule out a corneal ulcer, because a surface ulcer can also make the eye look cloudy. Sedation is sometimes needed in cattle for a complete and safe exam.

If the back of the eye cannot be seen because the cataract is dense, your vet may recommend ocular ultrasound to look for retinal detachment or other internal disease. If congenital defects are suspected, additional testing may include herd history review, BVD testing, or discussion of inherited disease risk. The goal is not only to label the cataract, but also to decide whether the eye is comfortable, whether vision remains, and whether there is an underlying problem that needs attention.

Treatment Options for Cataracts in Cows

Spectrum of Care means you have options. Here are treatment tiers at different price points.

Budget-Conscious Care

$75–$250
Best for: Cattle with mild, stable cataracts, no obvious pain, and acceptable function in their current environment.
  • Farm call or chute-side exam
  • Basic eye exam to distinguish cataract from corneal disease
  • Monitoring if the eye is comfortable and the cow is functioning well
  • Management changes such as safer pen design and lower-stress handling
  • Breeding discussion if a congenital or inherited cataract is suspected
Expected outcome: Often fair to good for comfort and day-to-day function if the cataract is nonpainful and the other eye sees well.
Consider: This approach does not remove the cataract. Vision may stay the same or worsen over time, and subtle underlying disease can be missed without more testing.
Most Common

Recommended Standard Treatment

$250–$900
Best for: Most cattle with a newly discovered cloudy eye, uncertain diagnosis, reduced vision, or signs that another eye disease may be present.
  • Complete veterinary eye exam
  • Fluorescein stain and pupil assessment
  • Sedation if needed for safe restraint
  • Treatment of concurrent problems such as pinkeye, uveitis, or trauma if present
  • Targeted diagnostics such as BVD testing or herd-level review in calves with congenital defects
  • Follow-up recheck to monitor comfort and progression
Expected outcome: Good for identifying whether the eye is comfortable and for separating a true cataract from more urgent eye disease. Visual outcome depends on cataract severity and any underlying damage.
Consider: Costs are higher than watchful monitoring, and some cattle still end up managed rather than surgically treated after the workup.

Advanced / Critical Care

$1,200–$3,500
Best for: Painful eyes, severe trauma, glaucoma, chronic inflammation, or cases where herd value or individual value supports referral.
  • Referral-level ophthalmic evaluation
  • Ocular ultrasound and advanced imaging when the back of the eye cannot be examined
  • Surgical treatment for a painful blind eye, most commonly enucleation
  • Hospitalization, anesthesia, and postoperative medications
  • Case-by-case discussion of whether specialty cataract surgery is realistic or appropriate in a bovine patient
Expected outcome: Good for comfort if a painful nonvisual eye is removed. Prognosis for restoring sight is guarded in cattle because cataract surgery is uncommon and case selection is limited.
Consider: Higher cost, transport and anesthesia demands, and limited availability of bovine ophthalmology services. Advanced care may improve comfort more than vision in many cattle.

Cost estimates as of 2026-03. Actual costs vary by location, clinic, and individual case.

Questions to Ask Your Vet About Cataracts in Cows

Bring these questions to your vet appointment to get the most out of your visit.

  1. Is this definitely a cataract, or could it be pinkeye, a corneal ulcer, scarring, or uveitis?
  2. Does my cow still have useful vision in this eye?
  3. Is the eye comfortable, or are there signs of pain or pressure?
  4. Do you recommend fluorescein stain, sedation, or ultrasound for a better diagnosis?
  5. Could this be congenital or inherited, and should this affect breeding decisions?
  6. Should we test for BVD or review herd vaccination and pregnancy history?
  7. What monitoring signs mean I should call you right away?
  8. If this eye becomes painful or blind, what are the conservative, standard, and advanced care options?

How to Prevent Cataracts in Cows

Not every cataract can be prevented, especially inherited or spontaneous cases. Still, herd management can lower risk for some important causes. One of the biggest prevention steps is working with your vet on a BVD control plan, including biosecurity, testing strategies, and vaccination protocols that fit your herd. Because in-utero BVD infection can cause congenital eye defects, protecting pregnant cattle matters.

Breeding decisions also matter. If a calf is born with cataracts or multiple congenital eye defects, ask your vet whether inherited disease should be considered before retaining related animals for breeding. This is especially relevant in lines where heritable cataracts have been reported.

Good eye health practices help prevent confusion and secondary damage even when they do not prevent cataracts directly. Prompt treatment of pinkeye, reducing eye trauma from rough forage or sharp hardware, and lowering fly pressure can help protect the eye from inflammation and scarring that may complicate diagnosis.

Finally, watch calves closely. Early recognition gives your vet the best chance to tell a stable congenital cataract from a painful eye disease that needs faster care. A cloudy eye is never a diagnosis by itself.

Find a Vet Near You