IP11 Ophtho - Flash Cards - Min Data Base

Question 1

layers that make up the fibrous tunic of the eye

Answer 1

cornea, sclera

Question 2

layers that make up the vascular tunic of the eye

Answer 2

iris, ciliary body, choroid (uveal tract)

Question 3

internal optical medias

Answer 3

squeous humor, lens, vitreous humor

Question 4

layers that make up the neural tunic of the eye

Answer 4

retina

Question 5

pupillary light reflex pathway

Answer 5

cn2- pretetcal nuclei- PS/EW nucleus- cn3

Question 6

iris atrophy causes _______ PLR

Answer 6

decreased/absent

Question 7

PLR is ______ in excited dogs

Answer 7

decreased

Question 8

dazzle reflex pathway

Answer 8

cn2, cn7

Question 9

menace response pathway

Answer 9

cn2, thalamus, occipital cortex, frontal cortex, cerebellum, cn7

Question 10

helps determine night blindness vs day blindness

Answer 10

maze testing

Question 11

branch of CN5 tested w/ palpebral reflex at lateral canthus

Answer 11

maxillary

Question 12

branch of CN5 tested w/ palpebral reflex at medial canthus

Answer 12

ophthalmic

Question 13

branch of CN5 tested w/ palpebral reflex at base of ear

Answer 13

mandibular

Question 14

palpebral reflex pathway

Answer 14

CN5, CN7

Question 15

w/ corneal reflex, cotton wisp must touch cornea over the _______

Answer 15

iris (where it can’t be seen)

Question 16

no eye movement w/ doll’s eye (oculocephalic) reflex is _______

Answer 16

abnormal

Question 17

nerves tested w/ doll’s eye (oculocephalic) reflex

Answer 17

vestibular system, cn3, cn8, cn6

Question 18

_____mm/60s is normal for STT

Answer 18

> 15

Question 19

_____mm/60s is suspect for KCS

Answer 19

15-Oct

Question 20

_____mm/60s is diagnostic for KCS

Question 21

correct placement for STT

Answer 21

inferior fornix, central to lateral 1/3 of lower lid

Question 22

measures taken by STT

Answer 22

lacrimal lake, basal tear production over 1 min, stimulated tear production over 1 min

Question 23

fluorescein stain is hydro____ and binds to the likewise charged corneal stroma if it is damaged

Answer 23

philic

Question 24

intraocular pressure should be determined in every _____ case with an intact cornea and sclera

Answer 24

red eye

Question 25

normal intraocular pressure in the dog

Answer 25

25-Dec

Question 26

normal intraocular pressure in the cat

Answer 26

27-Dec

Question 27

normal intraocular pressure in the horse

Answer 27

17-28

Question 28

the ______ final reading for intraocular pressure is the most accurate

Answer 28

lowest

Question 29

with normal IOP, we want

Answer 29

5

Question 30

tonometry method that requires horizontal cornea, so only useful for dogs/cats

Answer 30

schiotz

Question 31

with applanation tonometry use readings with coefficient variation of less than ____%

Answer 31

10

Question 32

tonometry method that uses an electromagnetically propelled probe that bounces off the cornea

Answer 32

rebound

Question 33

when taking a corneal culture, caution must be taken to not allow the animal to ______

Answer 33

blink (no eyelids touching swab)

Question 34

_____ test looks for fluorescin at nares to determine if there is an intact NL duct

Answer 34

jones

Question 35

a ____ gauge IV cath stylette used to flush NL duct, placed in the _____ puncta

Answer 35

24- upper

Question 36

test used to evaluate for perforation of the cornea, concentrated fluorescein placed on eye and pale rivulets looked for in the stain

Answer 36

seidel

Question 37

light source should be held at _______ from the animal for tapetal freflexes

Answer 37

arm's distance

Question 38

haziness in anterior chamber instead of black on purkinje images indicate ______

Answer 38

uveitis

Question 39

drug of choice to cause mydriasis, essential for a complete funduscopic exam

Answer 39

tropicamide (short acting, fast onset; opposite for atropine)

Question 40

_____ ophthalmoscopy gives upright image with narrow field of view at high magnification, setting on ophthalmoscope depends on location of lesion in the eye

Answer 40

direct

Question 41

_____ ophthalmoscopy gives inverted image with wide field of view at low magnification

Answer 41

indirect

Question 42

for indirect ophthalmoscopy, the lens should be ______ to the corneal surface

Answer 42

parallel

Question 43

tests retinal photoreceptor function, measures activity of cells in response to bright light flash

Answer 43

ERG (electroretinography)

Question 44

measures responses in the visual cortex; ERG must be normal and animal must have a functional optic nerve

Answer 44

VEP (visual evoked potential)

Question 45

allows visualization of the retina when the lens or cornea is opaque and visualization of the orbital portion of the optic nerve

Answer 45

ultrasound

Question 46

purkinje images

Answer 46

slide 58