Ohp 2 Lab 7

Front 1

The Macular Photostress test evaluates what 2 layers of the reinta?

Back 1

RPE and photoreceptors

Front 2

What pathology does the Macular Photostress test disguinguish when a person has reduced VA?

Back 2

Macular from optic nerve lesions

Front 3

What test is often done with the Macular Photostress test?

Back 3

Amsler Grid

Front 4

Macular Photostress test - VA are corrected for what?

Back 4

VA distance corrected

Front 5

Macular Photostress test - monocular or binocular?

Back 5

Monocular

Front 6

Macular Photostress test - Dark adaption methodology?

Back 6

Turn off lights and wait 1 minute.

Front 7

Macular Photostress test - Which eye to occlude?

Back 7

Worse acuity eye.

Front 8

Macular Photostress test - What kind of target?

Back 8

Isolated line that is one line larger than BCVA line.

Front 9

Macular Photostress test - Bleaching methodology?

Back 9

Transilluminator/penlight 2-3 cm from eye for 10 seconds

Front 10

Macular Photostress test - Method 2 is different how?

Back 10

Focus DO onto macular for 10 seconds

Front 11

Macular Photostress test - Normal recovery time? Abnormal recovery time?

Back 11

50-60 secs, 90-180 secs

Front 12

Macular Photostress test - Validity reduced when VA is?

Back 12

Worse than 20/80 BCVA

Front 13

Macular Photostress test - Large difference in recover time between eyes is important? (T/F)

Back 13

T

Front 14

Prolonged photostress recovery could indice what 4 problems?

Back 14

Cystoid macular edema, cellophane maculopathy, retinal pigment epithelium detachment, central serous retinopathy

Front 15

Amsler Grid - VA corrected for what?

Back 15

Near reading or 30 cm

Front 16

Amsler Grid - Working distance?

Back 16

30 cm

Front 17

Amsler Grid - Monocular or binocular?

Back 17

Monocular

Front 18

Amsler Grid - Chart number 1 details?

Back 18

Standard chart - Always used initially.

Front 19

Amsler Grid - Chart number 2 details?

Back 19

No central fixation point but diagonal arrows for central scotomas

Front 20

Amsler Grid - Chart number 3 details?

Back 20

Red on black for color scotomas

Front 21

Amsler Grid - Chart number 4 details?

Back 21

No lines so only shows scotomas, but doesn't show shape.

Front 22

Amsler Grid - Chart number 5 details?

Back 22

Parallel lines - Must be rotated to look for metamorphopsia.

Front 23

Amsler Grid - Chart number 6 details?

Back 23

Shows finer distortions along reading lines

Front 24

Amsler Grid - Chart number 7 details?

Back 24

For finer examination of juxta-central area. Good for high myopes when held in punctum remotum of uncorrected eye.

Front 25

What 2 techniques should be avoided before using an Amsler Grid?

Back 25

Ophthalmoscopy and artificial mydriasis

Front 26

Amsler Grid - Question 1?

Back 26

See white dot in center?

Front 27

Amsler Grid - Question 2?

Back 27

See four corners?

Front 28

Amsler Grid - Question 3?

Back 28

Lines are uninterrupted? (Scotomas)

Front 29

Amsler Grid - Question 4?

Back 29

Lines are distorted?

Front 30

Amsler Grid - Question 5?

Back 30

Vibrations or colors

Front 31

Amsler Grid - Question 6?

Back 31

How many squares from center and how many squares big is the bad spot?

Front 32

What do I record when no problems on Amsler Grid?

Back 32

No scotomas or metamorphopsia OD, OS

Front 33

What is the average and abnormal proptosis values for children?

Back 33

14.5-16mm, >20mm

Front 34

What is the proptosis values for adults (average), caucasians (range), african americans (range)?

Back 34

17 mm, 12-20 mm, 12-24 mm

Front 35

What proptosis difference between 2 eyes is significant?

Back 35

3 mm

Front 36

Which exophthalmometer uses yoked prisms or mirrors mounted on a cross bar? Which one uses a clear acrylic rod?

Back 36

Hertel, Luedde

Front 37

For the Hertel Exophthalmometer, how do I reduce measurement error induced from being off the saggital plane?

Back 37

Align the two red hairlines on the reflecting prism

Front 38

(T/F) Two eyes are measures concurrently with the Hertel Exophthalmometer

Back 38

F

Front 39

How do you avoid parallax errors with the Luedde Exophthalmometer?

Back 39

Line up the two corresponding mm markings with the corneal apex

Front 40

Which exophthalmometer recommends taking the average of several measurements?

Back 40

Luedde

Front 41

What does Ophthalmodynamometry (scleral compression) do?

Back 41

Measures the relative ophthalmic artery pressure

Front 42

Name 3 indications for scleral compression?

Back 42

Suspected carotid artery insufficiency, amaurosis fugax, unilateral reduced IOP

Front 43

Name 3 contraindications for scleral compression?

Back 43

Recent intraocular surgery, recent penetrating trauma, RD history.

Front 44

What should be measured before doing scleral compression?

Back 44

IOP OD, OS. Brachial blood pressure on both arms.

Front 45

For scleral compression, what rate of pressure should be exerted on the globe?

Back 45

20 grams/sec

Front 46

For scleral compression, when the disc artery pulsates, we can measure the (Dyastolic/Systolic) pressure?

Back 46

Systolic

Front 47

For scleral compression, when the disc artery collapses we can measure the (Dyastolic/Systolic) pressure?

Back 47

Dyastolic

Front 48

(T/F) For scleral compression, readings should be taken concurrently on a single eye. Then we should move on to the other eye.

Back 48

F - We should alternate between eyes.

Front 49

(T/F) We need to average the values 3 times for scleral compression

Back 49

T