Understanding Normal Eye Pressure in Dogs

Eye pressure in dogs is a common measure of ocular health. Abnormal levels of intraocular pressure (IOP) can indicate a number of underlying conditions, some of which can be serious. In 2021, the American College of Veterinary Ophthalmology (ACVO) updated its standards for veterinary care to include regular testing for IOP. This article will explain what IOP is, why it’s important, and how to recognize a dog who might have abnormal eye pressure.

What is Intraocular Pressure?

Intraocular pressure is a measure of the pressure inside a dog’s eyes. It is produced by the fluid that circulates within the eye, helping to keep the internal structures intact. Normal levels of IOP in dogs range between 10 and 24 millimeters of Mercury (mmHg) and can be measured using a variety of methods. Abnormal levels of IOP can indicate a number of potential ocular diseases, including glaucoma, cataracts, and uveitis.

Why is Intraocular Pressure Important?

Maintaining normal IOP is important for a dog’s eye health. High IOP can cause irreversible damage to the eye and can lead to blindness. In some cases, high IOP can be a symptom of a more serious condition, such as glaucoma or cataracts. Abnormal IOP can also be a sign of an underlying systemic condition, such as diabetes or kidney disease.

How is Intraocular Pressure Measured?

IOP can be measured using a variety of methods, including tonometry, applanation tonometry, and non-contact tonometry. Tonometry is the most common method used in veterinary practice and involves gently pressing a probe onto the surface of the eye. Applanation tonometry is a more precise method that involves measuring the flattening of the cornea when a probe is applied. Non-contact tonometry uses a specialized device that measures the IOP without touching the eye.

What are the Signs of Abnormal Eye Pressure in Dogs?

The signs of high IOP in dogs can vary depending on the underlying condition. Common signs include redness of the eyes, squinting, excessive tearing, cloudiness of the cornea, and bulging of the eyes. In some cases, a dog may also experience pain and discomfort in the eyes.

When Should My Dog be Tested for Intraocular Pressure?

The ACVO recommends that all dogs receive regular IOP tests as part of their routine veterinary care. Dogs should be tested at least once a year, and more often if they are at risk of developing ocular diseases. Dogs with a family history of ocular diseases should be tested more frequently, as should dogs who are known to have certain systemic conditions, such as diabetes or kidney disease.

Conclusion

Intraocular pressure is an important measure of ocular health in dogs. Abnormal levels of IOP can indicate a number of underlying conditions, some of which can be serious. It is important for all dogs to receive regular IOP tests as part of their routine veterinary care. By understanding IOP and recognizing the signs of abnormal eye pressure in dogs, you can help ensure your pet’s ocular health.