Vision Screening Flashcards

1
Q

most important measure of functional pathway

A

Visual acuity

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2
Q

Visual acuity is a measure of

A

functional pathway/ visual integrity

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3
Q

importance of visual acuity

A

report level of preservation or degradation and detect amblyopia and monitor the effectiveness of treatment

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4
Q

impairment of vision not due to organic damage or refractive errors

A

amblyopia

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5
Q

Child born with 20/100 vision (high refractive error) mut be treated within

A

7 years

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6
Q

Baby with congenital cataracts needs to be operated within

A

3 months

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7
Q

congenital cataract if not treated will lead to

A

irreversible amblyopia

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8
Q

congenital misalignments must be corrected within

A

2 years

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9
Q

congenital misalignment if not treated, will lead to

A

underdevelopment of stereopsis

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10
Q

disorders that may be brought about by use of steroids

A

retinal/optic disorders

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11
Q

intracranial hypertension may cause

A

papilledema

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12
Q

Types of Visual acuity

A
  1. recognition acuity

2. resolution acuity

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13
Q

most common measure of spatial vision and involve the resolution of featural differences in familiar
targets.

A

Recognition acuity

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14
Q

Detection of a target having two or more parts

A

Resolution acuity

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15
Q

(alternating black and white stripes

A

grating

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16
Q

Uses the alternating segments of black and white
stripes which must be presented to the patient to
determine their fixation preference in such patterns

A

Resolution acuity

17
Q

A rhythmic jerk nystagmus occurring when one is

looking at constantly moving objects.

A

OPTOKINETIC NYSTAGMUS

18
Q

small rapid jerky movement of the eye esp. as it
jumps from fixation on one point to another (as in
reading); can move from one visual stimuli to another

19
Q

The adjustment of the eye for various distances
whereby it is able to focus the image of an object on the
retina by changing the curvature of the lens. The ability
of the eye to accommodate decreases with age.

A
  1. ACCOMMODATION
20
Q

Tests vision of one eye; foveal fixation and quality

A

MONONUCLEAR FIXATION TESTING

21
Q

Foveal fixation involves fixation using

22
Q

Fixation Preference Test; tests presence of amblyopia

A

binocular fixation

23
Q

what is herring’s law

A

where one eye goes, the other eye

follows. Both eyes will elevate if the left eye is fixing

24
Q

involuntary pursuit response to moving

stripes filling up most of the visual field

A

OKN (Optokinetic nystagmus)

25
types of fixation testing
``` mononuclear fixation binocular fixation OKN Forced choice preferential looking visual evoked response ```
26
Confirmatory test for suspected cortically-blind patients
VISUAL EVOKED RESPONSE (VER)
27
VER measures the
summed occipital cortical response to | pattern stimulus
28
Visual acuity assessment for verbal (preliterate) children
``` allen picture cards HOTV test Lea symbols Landolt rings tumbling E test ```
29
Visual acuity assessment for verbal (literate) children
Snellen chart
30
HOTV letters are chosen because
they don't have laterality and are easily recognizable
31
figures included in lea symbols
apple square and circle
32
Discontinuous circles (letter Cs
Landolt rings
33
Low vision tests
count fingers hand motion light perception total blindness