Chalazion in Dogs
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The two most common problems associated with dog eyelids are abnormal conformation and eyelid tumors. Abnormal conformation simply means anything other than a nice, tight-fitting almond-shaped eyelid shape. Many breeds of dogs are bred to have unusual lid conformation, such as bloodhounds, St. Bernards, and flat-faced breeds such as Pugs see Macropalpebral Fissure Syndrome. Sometimes the unusual lid conformation leads to medical problems that damage the eye. Some of these conditions are:. This dog has entropion and secondary corneal ulcers.
A mass on the eyelid of your dog can be benign or malignant and can result for reasons such as gland issues or breed predisposition. A growth on the eyelid should be evaluated by a veterinary professional without delay; pain or vision inhibition can occur, causing distress for your companion. Eyelid tumors in dogs are very common, especially in older dogs. The majority of these eyelid tumors are non-cancerous, but there are some tumors that are cancerous. Eyelid tumors many times occur on the glands that line the eyelid margins.
A chalazion occurs when the meibomian glands or tarsal glands are clogged. The chalazion develops along the eyelid margin where the meibomian glands are located. Meibomian glands produce sebum oil , which helps keep the surface of the eye lubricated. The tear film protects the eye from particles dirt, dust and it also helps to keep the eye moist. When the opening of the meibomian gland duct gets clogged, the oil builds up in the gland and causes inflammation. This swelling in the gland is a chalazion. A chalazion is not a hordeolum stye.
Canine Eyelid Diseases
The purpose of the eyelids is simply to protect the eye from local injury. Though their function is simple the anatomy of the eyelid is complicated and is made up of layers of skin , muscle and mucus membrane. The tissues incorporate nerves and blood vessels, oil glands, hair follicles and secondary tear glands.