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Procedures > Steropsis/W4D > Flashcards

Steropsis/W4D Flashcards

1
Q

What is sensory fusion?

A

Uniting two images into 1

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2
Q

What are the 4 types of stereopsis?

A

Gross
Fine
Local
Global

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3
Q

Gross stereopsis

A

Large retinal disparities involvement of fovea and peripheral retina

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4
Q

Fine stereopsis

A

Small retinal disparities mainly foveal

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5
Q

Local stereopsis

A

Analysis of patterns over a small area of stimulus

Monocular cues possible

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6
Q

Global stereopsis

A

Analysis of pattern components over entire stimulus area

Patient must bifoveate

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7
Q

What is the highest level of stereopsis

A

Global

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8
Q

What is stereoacuity

A

Measured amount of stereopsis

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9
Q

Simultaneous perception

A

Able to see one image with each eye

No supression

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10
Q

Superimposition

A

Able to overlap images with different contours

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11
Q

Flat fusion

A

Able to overlap images with similar contours

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12
Q

Stereopsis

A

True binocular perception of 3D space

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13
Q

What is a distance local stereopsis test?

A

Vectographic projection

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14
Q

Randot E

A

Forced choice of which E is raised

Global

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15
Q

Lang test

A

2 levels of disparity, global

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16
Q

Butterfly

A

Global target with decreasing disparity

17
Q

Forms

A

Global target with smaller disparities

18
Q

Fly

A

Large disparity local stereo

19
Q

Wirt rings

A

Local targets with decreasing stereo

Monocular cues help

20
Q

Animals

A

Local targets, kid friendly

21
Q

Local norm

A

40-20’’

22
Q

Global norm

A

Down to 40’’, but any positive answer is good enough

23
Q

What are the three responses for W4D?

A

Fusion
Diplopia
Suppression

24
Q

suppression in dark

A

Deep suppression

25
Q

Suppression in bright

A

Shallow suppression

26
Q

Fusion at nose

A

Peripheral region of retina

27
Q

Fusion at distance

A

Central retina stimulated

Procedures (16 decks)

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