Ophtho terminology 3 Flashcards Preview

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Flashcards in Ophtho terminology 3 Deck (47)
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1

Uvea

Iris, ciliary body, choroid
Vascular tunic of globe

2

Uveitis

breakdown of blood ocular barrier (inflammation)

3

Anterior uveitis

inflamed iris and ciliary body

4

Posterior uveitis

inflammed choroid - likely chorioretinitis

5

Panuveitis

inflammation of uvea: iris, ciliary body and choroid

6

Endophthamitis

inflammation of all structures internal to fibrous tunic

7

Fibrous tunic

cornea and slera

8

Panophthalmitis

inflammation of all structures of the globe

9

Aqueous flare

PATHOGNOMIC sign: anterior uveitis - proteins suspended in anterior chamber

10

Keratic precipitates

PATHOGNOMIC sign: uveitis -cellular debris adheres to corneal endothelium - constant cycling convection currents

11

ciliary flush

360˚ deep corneal neovascularization

12

Fibrin

PATHOGNOMIC sign: uveitis - develops in the eye and adheres to delicate structures -> synechia

13

Hypopyon

PATHOGNOMIC sign: uveitis - wbc settles in anterior chamber

14

miosis

constriction of the pupil

15

Dyschoria

abnormally shaped iris - posterior synechia?

16

Synechia

adhesion of the iris to the lens (posterior)
Adhesion of the iris to the cornea (anterior)

17

Iris bombe

360˚ posterior synechia - AH becomes entrapped within posterior chamber causing iris to bulge forward

18

Hyphema

blood that settles within the anterior chamber - common with uveitis and indicative of large breakdown in blood ocular barrier
Hypertension and coagulopathies?

19

Hypotony

Decreased intraocular pressure
Consistent with anterior uveitis

20

Cycloplegia

paralysis of ciliary body muscle - atropine
can relieve pain from spasms

21

Nuclear sclerosis

hardening of the lens that occurs natural in animals.
Lens appears cloudy - doesn't indicate vision loss
6-7yrs

22

Cataract

Any opacity of the lens or lens capsule that prevents light passage

23

Parallax

utilizing the appearance of one object relative to another to determine depth

24

Lens zonules

small collagen fibrils arising from ciliary body that attach to the equater of the lens, securing the lens position wihtin the eye

25

Intumsecent cataract

Swollen
common in diabetics - driven by osmotic effect of sorbitol trapped in lens capsule

26

Phacoemulsification

modern technique for cataract surgery - lens broken by US eneregy and aspiration

27

Aldose reductase

enzyme that converts glucose to sorbitol - causes osmotic pulling effect

28

Lens luxation

complete detachment of the lens from lens zolnules - shifts side to side revealing aphakic cresent

29

Aphakic crestn

Phakic = lens
Lens subluxation displaces cresent where lens is visible displaced

30

Iridodonesis

movement of iris that occurs 2˚ to lens instability

31

Phacodonesis

movement of lens 2˚ to lens instability

32

Glaucoma

vision loss 2˚ to elevated intraocular pressure and damage to optic n. and retina

33

Carbonic anhydrase

enzyme in ciliary body that aids in production of AH
Target for glaucoma tx

34

Buphthalmos

enlargement of globe - glaucoma

35

Haab's Stria

fractures in descement's membrane that occur 2˚ to buphthalmos and stretching of globe
subtle white streaks across cornea

36

Goniodysgenesis

abnormal iridocorneal angle conformation - narrowed or closed
sheets of abnormal tissue often coat the angle

37

Gonioscopy

Use of goniolens applied to the surface of the eye which allows light to bend into iridocorneal angle and facilitates examination

38

Fundus

Interior surface of posterior segment of the eye: retina, optic nerve, choroid

39

Holangiotic vascular pattern

entire neurosensory retina gets blood

40

Merangiotic vascular pattern

neurosensory retinal vessels localized to horizontal streak on either side of optic nerve
Lagomorphs

41

Paurangiotic vascular pattern

neurosensory retinal vessels only near optic enerve
Equids

42

Anangiotic vascular pattern

neurosensory retina is absent of any blood vessels

43

Retinal detachment

separation of neurosensory retina from retinal pigment epithelium
Intraretinal breach

44

Retinal dialysis

tearing of retina from its attachment at the ora ciliaris retinae or from the optic dis in association w/ retinal separation
can be seen hanging from optic nerve or ora ciliarus retinae

45

Hypertensive retinopathy

retinal vascular damage caused by systemic hypertension

46

Progressive retinal atrophy (PRA)

series of inherited but rarely congenital progressive degenerative conditions affecting neurosensory retina or retinal pigmented epithelium
Associated with progressively impaired vision and blindness

47

Sudden acquired retinal degeneration syndrome (SARDS)

Syndrome of unknown etiology characterized by rapid death of photoreceptors causing sudden blindness in dogs
Some dogs exhibit CS indicating Cushings - most do not test positive