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Eye Conditions

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Blastomycosis
Blastomycosis is a fungal infection caused by the fungus Blastomyces dermatitidis. This fungus is commonly found in the river valleys of Tennessee, St. Lawrence, Ohio, Mississippi and Missouri as well...

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Blepharitis
Blepharitis is an inflammation of the eyelids. It may also refer to an inflammation of the tiny glands of the eyelid margin called the meibomian glands. There are many causes,...

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canine-uveitis
Canine Uveitis
Uveitis is an inflammatory process involving the middle of the three layers in the eye. To understand uveitis, it is important to know the basic anatomy of the eye. The...

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cataract
Cataracts
WHAT IS A CATARACT? A cataract is an abnormality of the lens in which an opacity, or a cloudy change, prevents light from reaching the retina. Cataracts can develop in...

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conjunctivitis
Conjunctivitis
GENERAL INFORMATION  The conjunctiva is the pink tissue that lines the inner surface of the eyelids and covers the white portion of the eyeball (sclera). It is a protective layer...

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cornealabscesshorse
Corneal Abscess in the Horse
The cornea is the clear front part of the eye. A thin layer of tissue called epithelium is the cornea’s protective outer layer. The inner surface is called the endothelium...

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corneal_dystrophy
Corneal Dystrophy
Corneal dystrophy and corneal degeneration are diseases of the cornea in which a white, opaque mineral (either cholesterol or calcium) is deposited in the cornea (the clear front part of...

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cornealendothelialdystrophy
Corneal Endothelial Dystrophy/Degeneration
The cornea is normally the transparent “windshield” of the eye, serving to protect the internal structures of the eye while allowing light to enter for vision. The endothelium is a...

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cornealsequestrum
Corneal Sequestrum
Corneal sequestrum is a disease affecting the cornea (the clear curved transparent part of the front the eye). The sequestrum is usually an area of degenerated or non-living corneal tissue....

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corneal_ulcer
Corneal Ulcers
The cornea is the transparent, domed front part of the eye that acts to protect the inside of the eye and maintain ocular integrity while also allowing light to enter...

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Distichiasischart
Distichiasis, Trichiasis and Ectopic Cilia
GENERAL INFORMATION Distichiasis is an abnormal condition in which extra eyelashes appear along the eyelid margin(s), where they normally should not grow. This condition is genetically inherited and is common in...

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ehrlichiosis
Ehrlichiosis (Tick Fever)
THE DISEASE AND ITS TRANSMISSION Ehrlichiosis (also called “tick fever”) is a disease observed across the continental U.S. and occurs with the most frequency in the southern and desert states....

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Episcleritis
GENERAL INFORMATION  Episcleritis is an inflammation of the episclera. The sclera is the white outer fibrous covering of the eyeball. The thin outer layer of tissue overlying the sclera is...

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equine_cataract
Equine Cataracts
A cataract is a dense opacity of the lens. Horses may be born with cataracts (congenital cataracts) or cataracts may develop after birth in the foal (juvenile cataracts) or the adult...

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Equine Corneal Ulcers
The cornea is the clear dome-shaped structure that forms the front surface of the eye and allows light to enter the eye for functional vision. It protects the structures inside...

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equine_recurrent_uveitis
Equine Recurrent Uveitis
Equine recurrent uveitis (ERU) is also known as “periodic ophthalmia” and “moon blindness”. Uveitis means inflammation of the iris and deeper structures inside the eye. ERU is the most common...

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eyelidmass
Eyelid Masses
Eyelid masses are most often benign in the dog. Cats have a higher incidence of malignant eyelid masses. Depending on the size, location and appearance of the mass your doctor...

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Feline Conjunctivitis and Keratitis
Conjunctivitis and keratitis are common eye problems in all ages of cats. Conjunctivitis refers to the inflammation of the pink membranes surrounding the eye, whereas keratitis refers to the inflammation...

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felineherpes
Feline Herpesvirus
Feline herpesvirus (FHV-1) is a common cause of eye and upper respiratory infection in the cat. This virus is very common in the cat population as 95% of cats have...

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feline_uveitis
Feline Uveitis
Uveitis is an inflammatory process involving the middle of the three layers in the eye. To understand uveitis, it is important to know the basic anatomy of the eye. The...

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glaucoma
Glaucoma
Glaucoma describes a neurodegenerative condition of the optic nerve, which eventually leads to blindness. In humans, elevated intraocular pressure is one of the major risk factors for developing glaucoma, however, in...

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horners_syndrome
Horner’s Syndrome
A syndrome is a collection of symptoms that often has a limited number of causes and can thus help doctors diagnose the underlying problem. The following clinical signs collectively indicate...

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Hypertensive Retinopathy
Systemic hypertension (high blood pressure) is a common problem in companion animals, particularly cats. Frequently there are no obvious outward signs indicating your pet has high blood pressure. The first...

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Hyphema
GENERAL INFORMATION Hyphema is a collection of blood within the front compartment (anterior chamber) of the eye and can be a sign of a serious disease process. There are many...

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collieeye
Inherited Eye Diseases in Collies
Like other breeds of dogs, Collies are prone to several inherited eye defects, including the following: Collie Eye Anomaly / Choroidal Hypoplasia (CEA/CH) Persistent Pupillary Membranes (PPM) Progressive Retinal Atrophy...

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keratoconjunctivitis_sicca
Keratoconjunctivitis Sicca
Keratoconjunctivitis sicca (KCS) results from a lack of aqueous tearing. To understand the “dry eye” syndrome, it is necessary to understand the normal health of the cornea as it relates...

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lens_luxation
Lens Luxation
Primary Lens Luxation is caused by an inherent weakness and degeneration of the ligaments that suspend the lens.  Primary lens luxation can be inherited in many breeds, including several terrier breeds,...

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lenticular_sclerosis
Lenticular Sclerosis
The lens of the eye bends light rays to produce a sharply focused image upon the retina. New lens fibers are constantly being formed by cells in the outer portion...

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Ocular Foreign Body Injuries
Ocular injuries resulting from accidental contact with cactus spines or other plant foreign bodies are often seen in dogs or cats in the desert area.  Corneal punctures, abrasions and lacerations...

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pannus
Pannus (Chronic Superficial Keratitis)
Pannus, or chronic superficial keratitis, is a progressive inflammatory disease of the cornea. Common clinical signs include pigmentation (brown discoloration), vascularization (blood vessel in-growth) and opacification (haziness) of the cornea....

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Pigmentary Uveitis in Golden Retrievers
Pigmentary uveitis, or Golden Retriever Uveitis (GRU), is a disease primarily seen in the Golden Retriever breed and does not appear to be associated with any systemic disease or infection....

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pra
Progressive Retinal Atrophy
To better understand progressive retinal atrophy, one must have a basic understanding of the function of the retina. The retina is a highly specialized tissue that lines the back of...

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eosinophilic_keratitis
Proliferative Keratoconjuntivitis (Eosinophilic Keratitis)
Eosinophilic keratitis is an inflammatory condition that affects the cornea and/or conjunctiva. The characteristic appearance is white, tan or pink roughened plaques on the corneal surface. These plaques are composed...

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squamouscellcarcinoma
Squamous Cell Carcinoma
Squamous cell carcinoma is one of the most common periocular tumors in horses, specifically horses located in areas of intense sunlight or high altitude. Non-pigmented regions of the skin are...

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sard
Sudden Acquired Retinal Degeneration Syndrome (SARDS)
Sudden Acquired Retinal Degeneration Syndrome (SARDS) is characterized by sudden vision loss in the dog. This disease affects the retina, which is in the back of the eye. For an...

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The Merle Gene and Multiple Ocular Abnormalities
The Merle gene is responsible for a wide variety of beautiful coat and iris colors in the dog. This dilution gene acts to lighten the coat color. The dappling effect...

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canine-uveitis
Uveitis
Uveitis is an inflammatory process involving the middle of the three layers in the eye. To understand uveitis, it is important to know the basic anatomy of the eye. The...

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Uveodermatologic Syndrome
Uveodermatologic Syndrome an autoimmune condition affecting the pigmented cells of the body, especially in highly pigmented organs like the eyes and skin. It is generally believed to be due to...

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