Questions and Answers
Which breed is most commonly associated with cherry eye?
Corneal foreign bodies can easily be wiped away and do not require significant surgical intervention.
False
What is the primary treatment for indolent ulcers?
Debride and grid surgery
The layer below the corneal epithelium is called the ______.
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Match the following conditions with their associated characteristics:
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What is the likely consequence of untreated corneal ulcers?
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Fluorescein staining can be used to detect corneal ulcers.
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What test is performed to check lacrimal drainage?
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In pigmentary keratitis, there is an invasion of the cornea by ______.
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Study Notes
Squamous Cell Carcinoma
- Rare lid tumor occurrence in cats, characterized by nodular or erosive forms.
- Affects other ocular tissues significantly less frequently in feline patients.
Cherry Eye
- Refers to the prolapse of the nictitating gland, primarily seen in English bulldogs.
- Surgical method called pocket technique is utilized to preserve gland function.
Corneal Foreign Bodies
- Foreign matter can adhere to the cornea and is typically removed by either wiping or squirting.
- Intracorneal locations may require microsurgical intervention for removal.
Non-Ulcerative Conditions
Pigmentary Keratitis
- Features the invasion of the cornea by melanocytes, resulting in pigment accumulation.
- More prevalent in brachycephalic breeds of dogs.
Dermoid
- A congenital malformation where a patch of skin develops abnormally on the ocular surface.
Pannus
- Involves the formation of inflammatory and vascular tissue advancing across the cornea, particularly ventrolaterally.
- Often associated with German Shepherd dogs.
Paracentral Lipid Dystrophy
- Characterized by crystalline fat deposits occurring in the central cornea, affecting its clarity and function.
Uveitis
- Canine anterior uveitis requires mydriatic medications (dilators) for pain alleviation.
Glaucoma
- Defined by an abnormal increase in intraocular pressure, often due to closed-angle drainage abnormalities.
- Topical steroids are contraindicated in treatment.
Corneal Stroma
- Located beneath the corneal epithelium, this layer is vulnerable to destructive enzymes.
- Bacterial infections can lead to proteolytic enzyme release, causing damage.
Corneal Ulcers
- Represent full thickness defects in the corneal epithelium, with perforation being the most severe outcome.
- Fluorescein staining is essential in diagnosis and visualization.
Indolent Ulcers
- Specific type of ulceration that does not show signs of infection, deepening, or melting.
- Always require debridement and grid surgery for resolution.
Lacrimal Drainage
- Fluorescein drainage test assesses tear drainage; nostril staining indicates proper function when seen within 3-4 minutes.
Conjunctivitis
- Non-specific conjunctivitis presents as diffuse reddening of the conjunctiva along with mucopurulent discharge.
- Chronic dry eye diagnosis includes the Schirmer tear test to evaluate tear production.
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Description
Explore key concepts in ophthalmology related to feline and canine conditions. This quiz covers topics such as squamous cell carcinoma, cherry eye, corneal foreign bodies, and pigmentary keratitis. Test your knowledge on these specific ocular issues found in pets.
