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Small animal med. > Ophtho terminology 2 > Flashcards

Ophtho terminology 2 Flashcards

Lacrimal system - Cornea (2)

1
Q

Percorneal tear film

A

components of the tear film which include outer oily, middle aqueous, inner mucin layer

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2
Q

Quantitative KCS

A

inflamed corneal and conjunctiva 2˚ to dryness caused by impaired lacrimal gland production and decreased tear flow

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3
Q

Qualitative KCS

A

inflamed corneal and conjunctiva 2˚ to inadequate production of mucin or lipid components of percorneal tear film

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4
Q

Neurogenic KCS

A

inflamed corneal and conjunctiva 2˚ to dryness caused by loss of PSNS innervation to lacrimal glands and ipsilateral nasal mucosa

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5
Q

Parotid duct transposition

A

Sx procedure: for KCS non-responsive to medical tx

duct of salivary gland is relocated to lower conjunctival fornix and saliva is used for tear deficiency

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6
Q

Nasolacrimal drainage system

A

conduit for tear flow from external eye to the nasal cavity

Puncta, canaliculi, lacrimal sac, nasolacrimal duct

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7
Q

Dacryocystitis

A

Inflammation of the the nasolacrimal drainage system often due to obstruction from FB, infection, trauma

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8
Q

Oiter oily tear film source

A

meibomian gland

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9
Q

Middle aqueous film source

A

Lacrimal and 3rd eyelid gland

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10
Q

Inner mucin film source

A

Goblet cells :)

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11
Q

Facet

A

Loss of corneal stroma with intact overlying epithelium

Occurs because epithelization of corneal ulcer processes more rapidly that stromal healing

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12
Q

Corneal edema

A

Blue opacity - heterogenous or fluffy

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13
Q

Epithelial disruption

A

corneal ulceration

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14
Q

Endothelial disruption

A

Uveitis, glaucoma, degeneration/dystrophy

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15
Q

SF corneal neovascularization

A

response to SF diseases
Tree like vessels crossing limbus
Can coalesce to form raised granulation tissue

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16
Q

Deep corneal neovascularization

A

Deep disease disease
straight, cannot be seen crossing limbus
Dont extend as far as SF vessels

17
Q

Ciliary flush

A

360˚ deep corneal neovascularization

Arrive from intraocular, deep origin

18
Q

WBC corneal infiltration

A

sign of active keratitis

Painful - yellow green appreance and common in equine stromal abscess and keratomalacia (melting ulcer)

19
Q

Corneal fibrosis

A

Scarring - stromal collage contracture, appears dull and wispy white
Ghost vessels possible
Non painful

20
Q

Corneal dystrophy or degeneration

A

Dystrophy - corneal lipid layer appears glittery and shiny

Degeneration - calcium, appears gritty and chalky

21
Q

Feline corneal sequestrium

A

devitalized portion of feline corneal stroma that pigments amber to black
2˚ to chronic or recurrent corneal ulceration

22
Q

Keratic precipitates

A

cellular adhesions to the endothelium
PATHOGNOMIC for uveitis
Tiny dots from the mid portion become lager in ventral cornea

23
Q

Reflux uveitis

A

infection inside due to processes outside
In response to complicated corneal ulcer: trigeminal N. and cytokines cause direct stimulation of ciliary body = spasm, pain, and disrupted blood ocular barrier (uveitis)

24
Q

SF corneal ulceration

A

loss of corneal epithelium w/o loss of stroma

25
Q

Simple/uncomplicated corneal ulcer

A

a SF ulcer that heals in expect time <7d

26
Q

Complex/Complicated corneal ulcer

A

any ulcer that doesn’t heal in 7d

27
Q

Indolent ulcer/Spontaneous chronic corneal epithelial defect (SCCED)

A

ie Boxer ulcer

Canine specific form of complex corneal ulceration in which the epithelium fails to adhere to underlying stroma

28
Q

Descemetocele

A

corneal ulcer that reaches descemetes membrane

classic staining pattern

29
Q

Keratomalacia

A

Softening of cornea due to collagenolysis from infection and ocular inflammatory response

30
Q

Iris prolapse

A

one of the only rules out for a brown, raised, corneal opacity
Iris will rush forward to plug corneal perforation

Small animal med. (7 decks)

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