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Optho > Uveal diseases > Flashcards

Uveal diseases Flashcards

1
Q

3 parts of uveal tract

A

Iris
ciliary body
choroid

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2
Q

What is the uveal tract

A

vascular tunic of the eye

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3
Q

Functions of iris

A

regulate light entering eye
Maintain blood aqueous barrier
Plug hole in case of corneal perforation

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4
Q

3 zones of iris

A

Pupillary zone
Collarette
ciliary zone (base of iris)

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5
Q

Functions of uveal tract

A

Maintain blood aqueous barrier
Produce aqueous humor
Accommodation

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6
Q

Function of choroid

A

Provide nutrients/oxygen to retina

Maintain blood aqueous barrier

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7
Q

Two barriers of blood ocular barrier

A

Blood aqueous barrier

blood retinal barrier

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8
Q

Heterochromia

A

variation in iris color
Different color between two eyes
Different coloration in same iris

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9
Q

Uveal cyst vs. melanocytoma

A

Uveal cyst: perfect circle, free floating

Melanocytoma: Solid structure, attached to iris

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10
Q

Persistent pupillary membranes

A

inherited or spontaneous failure of the pupillary membranes to regress appropriately

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11
Q

Iris hypoplasia

A

incomplete development of the iris

thin, abnormal

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12
Q

aniridia

A

complete lack of iris tissue

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13
Q

What condition do aniridia animals have

A

photophobic

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14
Q

Iris coloboma

A

defect in small area of the iris

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15
Q

Typical coloboma

A

6 o’clock postion

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16
Q

atypical coloboma

A

any other position

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17
Q

Dyscoria

A

abnormal shape to the pupil

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18
Q

Correctopia

A

abnormal position of the pupil

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19
Q

iris atrophy originates from

A

edge of iris

20
Q

Uveitis

A

inflammation of the uveal tract

21
Q

Anterior uveitis

A

iris + ciliary body

22
Q

Posterior uveitis

A

Choroid

23
Q

Endophthalmitis

A

iris + ciliary body + choroid

24
Q

Clincial signs of uveitis

A

Lots and lots of things

25
Q

What causes the aqueous flare

A

entire anterior chamber has protein in it

26
Q

Hypoyon

A

inflammatory cells or pus in anterior chamber

27
Q

If you have hyphema, you have

A

uveitis

28
Q

hyphema

A

blood in AC

29
Q

Keratic precipitates

A

granulomitus inflammation

30
Q

Posterior synechiae

A

irregular shape to the pupil

31
Q

Iris bombe

A

fluid flows to posterior chamber but cant pass through iris fast enough

32
Q

What breeds are predisposed to uveodermatologic syndrome

A

artic breeds

33
Q

Uveodermatologic syndrom

A

retinal detachment/degeneration

secondary glaucoma/cataracts

34
Q

What is the most common cause of horse blindness

A

Equine recurrent uveitis

35
Q

What breed is most likely to get ERU

A

appaloosas

36
Q

Lens induced uveitis is caused by what

A

Immune mediated

37
Q

What is the most frequent cause of secondary glaucoma in the dog

A

lens-induced uveitis

38
Q

Is blastomycosis unilateral or bilateral

A

Bilateral

39
Q

What does blastomycosis present as

A

anterior uveitis, posterior uveitis, or both

40
Q

Anterior uveitis is caused by

A

parasites (dirofilaria immitis)

41
Q

Characteristics of lens-induced uveitis

A

form of immune mediated
Dogs react more
cause secondary glaucoma

42
Q

What is the most frequent cause of secondary glaucoma in the dog

A

Lens-induced uveitis

43
Q

Serology for diagnosis of uveitis

A

Canine: tick titiers, toxoplasmosis
Feline: FeLV, FIV, FIP, toxo

44
Q

therapies for uveitis

A 
Anti-inflammatories 
NSAIDS
Atropine
Topical steroids
Immunosuppressants
45
Q

Most common anterior uveal tumor in dogs

A

melanomas

46
Q

second most common anterior uveal tumor in dogs

A

lymphoma

Optho (13 decks)

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