Special Senses Flashcards
Cause of secondary glaucoma?
Anything that obstructs teh pupil or trabecular meshwork
Most common disease of the lens
Cataract
Blepharitis
Inflammation of the eyelids
Condition

Corneal Ulcer, Corneal edema and hypopyon
Condition

Corneal lipidosis
Condition

Otitis Media
T/F: Collie Eye Anomaly is always bilateral.
True
Consequences of otitis media?
Inflammation or perforation of tympanic membrane
Erosion of auditory ossicles
Horners syndrome
Osteosclerosis of tympanic bulla
Inflammatory polyps
Progression to otitis interna
Condition

Corneal edema
Glaucoma
Increase IOP due to movenment of aqueous
Primary vs Secondary
Ciliary-Iridociliary adenoma/carcinomas are typically (benign/malignant)
Benign
Cause of Keratomalacia
Rapidly progressing bacteral infection
Condition

Anterior Uveitis
Primary pathogens causing conjunctivitis are rare except in what species?
Cats
Cause of Retinal Dysplasia
Variety of retinal injuries in the embryonic eye or as inherited condition
Condition

Corneal Sequestrum
Tractional cause of retinal detachement
Maturation of fibrin in vitreous
Causes of uveitis
Hypersensitivity
Infectious
Lens induced
Possible underlying factors of otitis externa
Allergic disease
Ectoparasitism
Foreign bodies
Conformation
Moisture
Anterior Synechia
Fibrous adhesions between iris and cornea
Posterior synechia
Fibrous adhesions between iris and lens
Condition

Microphthalmia
T/F: Histology is recommended for cases of conjunctivitis.
False
__________________________
Histology is NOT recommended - by the time clinical signs develop, primary pathogens are gone
Otitis media infections are almost always due to what causative agent?
Bacterial
Phacolytic Lens Uveitis
Leakage of lens proteins from hypermature cataract
Pathogenesis of Nodular Granulomatous Episceritis
Immune mediated
Type of condition

Corneal pigmentation
Causes of Retinitis
Extension from choroiditis or encephalitis
Neurotropic viral infection
Visceral Larval Migrans
Bacterial pathogens commonly associated with Otitis media
Pasteurella multocida
Mycoplasma spp
Most common cause of blindness in the horse
Equine Recurrent Uveitis
Condition

Staphyloma
Common name for this condition seen in puppies?
Etiology?

“Blue Eye”
Infectious Canine Hepatitis - CAV
Causes of developmental anomalies
Genetic defect
In utero infection
In utero exposure to teratogens
Condition

Goniodysgenesis
Condition

Keratitis
Condition

Iris Hypoplasia
Condition

Feline Diffuse Iris Melanoma
Lesion associated with Uveal Lymphoma
Thickening and pallor of uvea
Consequences of descemetoceles
Iris prolapse
Staphyloma
Descemetocele
Perforated Ulcer
Causes of Retinal Degeneration and Atrophy
Senile Change
Progressive Retinal Atrophy
Toxicity
Metabolic deficiencies
Increased IOP
Pathogenesis of Auricular Hematomas
Trauma - excessive head shaking > centrifugal shearing forces fracture cartilage and lacerate blood vessels
Consequences of otitis externa
Fibrosis
Adnexal atrophy and hyperkeratosis
Constant ear infections
Middle/Inner Ear infections
Pathogenesis of Chronic Superficial Keratitis - “Pannus”
Immune mediated
Exudative causes of retinal detachement
Choroiditis
Retinitis
Hemorrhage
Neoplasm
Condition

Otitis Externa
Synechia
Fibrous adhesions
Lesion assciated with ciliary-iridociliary adenoma/carcinoma
Discrete nodules in posterior segment
Coloboma
Notch like defects of the optic disk, retina and or uvea as a result of defective closure of the embryonic fissure of the eye
Lesion associated with Retinal Dysplasia
Jumbling of retinal layers
It is important to differentiate Feline Diffuse Iris Melanoma from what other condition?
Melanosis
Condition

Auricular Hematoma
Consequences of uveitis
Synechia
Pre-iridal fibrovascular membrane
Iris bombe
Cataract
Lens luxation
Glaucoma
Retinal detachment
Phthisis bulbi
Lens response to injury:
Hydropic swelling
Hyperplasia and Fibrous Metaplasia
Posterior Lens Epithelial Migration
Chronic “Hypermature”
Causes of Corneal Opacity
Corneal Edema
Keratitis
Hyphema
Retinal Hypertensive Vasculopathy
Condition?

Retinal Hypertensive Vasculopathy
Cyclopia Synophthalmos in lambs is caused by
Ingestion of Veratrum californicum on day 14 of gestation
Pathogenesis of Corneal Endothelial Dystrophy
Bilaterally symettrical foci of opacity > Progress to diffuse opacity
Condition

Retinal Dysplasia
Condition

Ceruminous Neoplasia
Causes of corneal pigmentation
Staphyloma
Chronic Keratitis
Corneal Sequestration
Canine Melanoma on the conjunctiva of the eye is likely (benign/malignant)
Malignant
Condition

Descemetocele
Canine Melanoma on the haired skin of the eye is likely (benign/malignant)
Benign
Condition

Cataract
Consequences of retinitis
Gliosis (Scarring)
Atrophy
Condition

Corneal Ulcer
Indications of retinal degeneration and atrophy seen on a fundic exam
Decreased vascularity
Optic disc atrophy
Changes in tapetal reflection
Chalazion
Granulomatous infection directed against meibomian gland
Most common neoplasm of the external acoustic meatus of dogs and cats
Ceruminous neoplasia
Condition

Squamous Cell Carcinoma
Otic adenomas are more common in (dogs/cats)
dogs
Condition?

Retinal degeneration and atrophy
Histologic findings of Nodular Granulomatous Episcleritis
Granulomatous keratoconjunctivitis
Keratomalacia - “Melting Ulcers”
Necrosis of corneal epithelium and stroma, usually due to innocent bystander injury from leukocytes
DDx for Hyphema
Primary Vascular Lesion
Disorder of Hemostasis
Condition

Iris Bombe
Corneal Edema occurs in response to
Injury to epithelium
Injury to endothelium
Increased IOP
Immune mediated
Condition

Lens-Induced Uveitis
Pathogenesis of “Blue Eye” in puppies
Immune complex deposition in corneal endothelium
Feline Diffuse Iris Melanoma is seen in cats primarily with what color eyes
Yellow
Disease unique to cats due to subsequent ocular trauma. It causes malignant invasion of the eye, down optic nerve and distance metastasis following enuculation.
Intraocular Sarcoma
Condition

Equine Recurrent Uveitis
Chronic Superficial Keratitis is predisposed in what breed of dog
German Shepherd Dog
Condition

Keratitis
Condition

Corneal Dermoid
Condition

Intraocular sarcoma
Condition

Keratic precipiates and rubeosis iridis
Etiology of “Blue Eye” in puppies
Infectious Canine Hepatitis - CAV-1
Keratitis is a gross feature of
Inflammation
Condition

Iris Coloboma
Condition

Uveal Lymphoma
How do you diagnose corneal ulceration?
Stain eye with Fluorescein Dye
Ophthalmoscopic findings of Collie Eye Anomaly
Retinal vessel tortusosity
Focal to diffuse choroidal and tapetal hypoplasia
Optic Nerve Coloboma
Retinal Separation with intraocular hemorrhage
Hyphema
Blood in the anterior chamber
Common secondary bacterial/fungal pathogens associated with Otitis Externa
Staphylococcus
Pseudomonas
Proteus
Malassezia pachydermatitis
Condition

Cyclopia/ Synophthalmos
Corneal lipidosis is typically associated with what other disease
Hyperlipidemia
Lens Induced Uveitis
Inflammatory response to lens proteins
Pathogenesis of Keratoconjunctivitis Sicca
Immune mediated injury to lacrimal glands > decreased tear and or change in composition of tears > drying of cornea/conjunctivia > chronic irritation
Corneal response to injury:
Edema
Epithelial regeneration
Neutrophil mediated stromal lysis
Neovascularization
Stromal fibrosis
Cause of cataracts
Swelling/degeneration of lenticular fibers
Staphyloma
entrapped iris
Consequences of ciliary-iridociliary adenoma/carcinoma
Secondary Glaucoma
Hyphema
Retinal Detachment
Goniodysgenesis
Detectable malformation of the trabecular meshwork
Chorioretinitis
Inflammation of Choroid and Retina
Condition

Retinal Detachment
Gross features of conjunctivitis
Hyperemia
Swelling/Edema
Discharge
Chemosis
Pigmentation
Posterior Uveitis
Inflammation of choroid
In Feline Diffuse Iris Melanoma the rate of metastasis is (high/slow) and the rate of glaucoma development is (high/slow)
Slow, High
Condition

Keratomalacia
“Melting Ulcers”
Underlying factors of otitis media
Functionally of auditory tubes
Immunocompetency
Condition

Meibomian (sebaceous) adenoma
Pathogenesis of Collie Eye Anomally
Genetic - inherited autosomal recessive trait
Condition

Conjunctivitis
Condition

Ciliary Adenoma or Carcinoma
Panophthalmitis
Inflammation of the cornea and sclera
Consequences of otitis interna
Meningitis
Vestibular disease
Sensory hair cell loss- permanent hearing impairment
Stye
Bacterial infection of hair follicle or meibomian gland - usually staphylococcus aureus
Condition

Keratoconjunctivitis Sicca
Characterisitic lesion of Corneal Sequestrum
Black lesion in the cornea
Uveal lymphoma is difficult ot differentiate from what other disease?
Uveitis
Phacoclastic Lens Uveitis
Rupture of the lens - more severe
Endophthalmitis
Inflammation of the uvea, retina, and vitreous
Condition

Collie Eye Anomaly
Condition

Glaucoma
Uveal melanoma is usually (benign/malignant) in dogs
Benign
Otic carcinomas are more common in (dogs/cats)
Cats
Pathogenesis of Equine Recurrent Uveitis
Hypersensitivity reaction to previous systemic infection
________________________________________
Leptospira interrogens
Anterior Uveitis
Inflammation of iris and ciliary body
Corneal Sequestrum
Cats
Localized necrosis of the epithelium and anterior stroma from severe corneal injury. Affected area gets infiltrated with dark pigment that is present in tear film
Condition

Luxated Lens
Condition

Ankyloblepharon
Primary pathogens that cause conjunctivitis
Feline Herpesvirus 1
Chlamydophilia felis
Mycoplasma felis
Cause of primary glaucoma?
Goniodysgenesis
Condition

Retinal Detachment
Evidence of malignancy in eye lesions
Raised lesions
Velvet surface
Distortion of pupil/iris