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NBCOT > Vision/Low Vision > Flashcards

Vision/Low Vision Flashcards

1
Q

Best-corrected visual acuity less than 6/12 (<20/40) in the better seeing eye

A

Low Vision

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2
Q

20/30 to 20/60

A

Mild vision loss or Near-normal vision

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3
Q

20/70 to 20/160

A

Moderate visual impairment or moderate low vision

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4
Q

20/200 or worse

A

Severe visual impairment or severe low vision

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5
Q

<20/1000

A

Profound visual impairment or near-total low vision

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6
Q

No light perception

A

total visual impairment or total blindness

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7
Q

Ability to see small visual details, ensuring that precise visual info is provided to the CNS

A

Visual acuity

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8
Q

Difficulty focusing on NEAR objects, common in age related change in adults over 50

A

Presbyopia

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9
Q

Nearsightedness, is a normal deficiency in visual acuity in which near objects are seen more clearly than distant objects

A

Myopia

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10
Q

Farsightedness, is a normal deficiency in visual acuity in which distant objects are seen more clearly than near objects

A

Hyperopia

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11
Q

Ability to perceive and detect objects in relationship to the background of their environment, ability to see shades of color, essential to negotiating environments safely

A

Contrast sensitivity

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12
Q

Scope of vision in each eye. Provides background info about one’s position in relationship to the environment and is quick to detect motion

A

Peripheral visual field

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13
Q

The central 20 degree of vision

A

Central Visual Field

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14
Q

Ability to move eyes smoothly and in coordinated manner through full ROM.

A

Oculomotor Control

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15
Q

Ensuring one object is seen even though 2 images are being provided to CNS

A

Binocular Vision

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16
Q

Ability to adjust focus of vision at different distances. Can be affected by normal aging caused by presbyopia

A

Accommodation

17
Q

Muscle action of eyes that moves them inward (adduction) to allow focusing on nearby objects

A

Convergence

18
Q

Causes the perception of two images of a single object. Pt may assume head position or tilt to eliminate

A

Diplopia

19
Q

Ability to identify specific features of an object and ignore other irrelevant sensory info

A

Visual Attention

20
Q

Occurs when visual search patterns are confined to one side of the visual array in which client misses info on the other side

A

Hemi-inattention

21
Q

General functional impairments in visual related to aging

A

(1) Ability to see close objects and coordinate the eyes decrease
(2) Images becomes blurrier
(3) Ability to see at night decreases
(4) Eyes adapt more slowly to changes in lighting conditions
(5) Contrast sensitivity decreases
(6) Ability to view objects in low light decreases
(7) Ability to distinguish certain colors diminishes
(8) Visual field becomes narrow

22
Q

Affects the central portion of eye that provides fine detail for near-distance activities like reading
Objects appear distorted in shape, straight lines appear wavy

A

Age-related Macular Degeneration

23
Q

Cause loss of peripheral vision

A

Glaucoma

24
Q

Fluctuating vision, including blurred vision and peripheral vision loss
Decrease contrast sensitivity and difficulty identifying low-contrast items

A

Diabetic Retinopathy

25
Q
  • Occurs when lens becomes more opaque or clouded, reducing light going into retina and altering vision.
  • Cloudy or blurry vision (Visual acuity is reduced for near-distance tasks including reading)
  • Faded colors
  • Glare
  • Poor night vision
A

Cataracts

26
Q

Type of vision loss following brain injury in which half of the visual field in each eye is lost

A

Homonymous Hemianopsia

27
Q

Is a combination of hemi-inattention and Left visual field deficit resulting in exaggerated inattention towards the Left half of the visual space surrounding the body.
Client often does not move eyes past midline

A

Visual Neglect

28
Q

General guidelines for treating

A

-Provide education on home and work modifications
-Perform driver evaluation for adults whose vision impairment is stable
-Educate on fall prevention strategies
Educate and refer to community resources (Orientation and Mobility Specialist)

29
Q

OT Evaluation

A
  • Background data (Review medical records; Complete Occupational Profile; Administer interviews, questionnaires, and standardized or structured assessment)
  • Assess visual acuity, contrast sensitivity, visual field, oculomotor function
30
Q

OT Intervention

A
  • Visual Acuity (magnification options, lighting, contrast, organization)
  • Visual Field (visual search and scanning)
  • Oculomotor function

NBCOT (12 decks)

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