VCA Veterinary Referral and Emergency Center


The fluid inside the eye is called the aqueous humor. The aqueous humor is produced and drains from the eye at approximately the same rate, resulting in a stable pressure inside the eye of 15 to 20 mmHg (millimeters of mercury). Glaucoma occurs as a consequence of a defect in the drainage angle resulting in inadequate outflow of aqueous humor and a subsequent buildup of pressure inside the eye. The resulting high pressure damages the optic nerve and results in blindness.

The Tono-Pen is a hand held instrument used to measure fluid pressure in the eye. By gently tapping on the cornea three measurements are taken. The unit then displays an average of the readings. The Tono-pen allows us to monitor the progression of glaucoma.


Emergency/Critical Care

General Practice

We have over 600 animal hospitals in 41 states and 4 Canadian provinces that are staffed by more than 3,000 fully-qualified, dedicated and compassionate veterinarians, with more than 400 being board-certified specialists.

The nationwide VCA family of general practice hospitals give your pet the very best in medical care, providing a full range of general medical and surgical services as well as specialized treatments such as wellness, spay/neuter, advanced diagnostic services (MRI/CT Scan), internal medicine, oncology, ophthalmology, dermatology, cardiology, neurology, boarding, and grooming. Services may vary by location.

Our family of pet hospitals stands out by delivering the greatest resources in order provide the highest quality care available for your pets. By maintaining the highest standards of pet health care available anywhere, we emphasize prevention as well as healing. We provide continuing education programs to our doctors and staff and promote the open exchange of professional knowledge and expertise. And finally, we have established a consistent program of procedures and techniques, proven to be the most effective in keeping pets healthy.

Find a VCA General Care Animal Hospital near you:


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Emergency Care

24/7/365, if your pet has a medical emergency, you can find us at the following address:

VCA Veterinary Referral & Emergency Center
123 West Cedar Street, Norwalk, CT 06854
Telephone: 203-854-9960

Click here for directions to our location.

VCA Veterinary Referral & Emergency Center is a fully-equipped 24/7/365 emergency hospital serving pets and their people in Norwalk and the surrounding communities in Fairfield County and southwestern Connecticut. If you suspect your pet is having a medical crisis, our experienced team of veterinarians, technicians and assistants are here to assist you.

Our Emergency and Critical Care units can assist in all of the following situations requiring immediate medical attention: Auto accidents, traumatic injuries (fractures, bites, burns, lacerations, wounds), respiratory emergencies (choking, difficulty breathing), vomiting, diarrhea, difficulty urinating/defecating, shock, loss of consciousness, dizziness, staggering, tremors, seizures, paralysis, toxic reactions, poison ingestion, labor and delivery problems, blood in urine or feces, swollen, hard, painful abdomen, heatstroke.