Ophtho terminology 2 Flashcards Preview

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Flashcards in Ophtho terminology 2 Deck (30)
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1

Percorneal tear film

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

2

Quantitative KCS

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

3

Qualitative KCS

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

4

Neurogenic KCS

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

5

Parotid duct transposition

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

6

Nasolacrimal drainage system

conduit for tear flow from external eye to the nasal cavity
Puncta, canaliculi, lacrimal sac, nasolacrimal duct

7

Dacryocystitis

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

8

Oiter oily tear film source

meibomian gland

9

Middle aqueous film source

Lacrimal and 3rd eyelid gland

10

Inner mucin film source

Goblet cells :)

11

Facet

Loss of corneal stroma with intact overlying epithelium
Occurs because epithelization of corneal ulcer processes more rapidly that stromal healing

12

Corneal edema

Blue opacity - heterogenous or fluffy

13

Epithelial disruption

corneal ulceration

14

Endothelial disruption

Uveitis, glaucoma, degeneration/dystrophy

15

SF corneal neovascularization

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

16

Deep corneal neovascularization

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

17

Ciliary flush

360˚ deep corneal neovascularization
Arrive from intraocular, deep origin

18

WBC corneal infiltration

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

19

Corneal fibrosis

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

20

Corneal dystrophy or degeneration

Dystrophy - corneal lipid layer appears glittery and shiny
Degeneration - calcium, appears gritty and chalky

21

Feline corneal sequestrium

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

22

Keratic precipitates

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

23

Reflux uveitis

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

SF corneal ulceration

loss of corneal epithelium w/o loss of stroma

25

Simple/uncomplicated corneal ulcer

a SF ulcer that heals in expect time <7d

26

Complex/Complicated corneal ulcer

any ulcer that doesn't heal in 7d

27

Indolent ulcer/Spontaneous chronic corneal epithelial defect (SCCED)

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

28

Descemetocele

corneal ulcer that reaches descemetes membrane
classic staining pattern

29

Keratomalacia

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

30

Iris prolapse

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