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ABDO FQEs > D3 & 4 - Low Vision Appliances > Flashcards

D3 & 4 - Low Vision Appliances Flashcards

(52 cards)

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1
Q

Hand Held Magnifier:

Features

A

Simple magnifier

Single plus power biconvex lens

May be illuminate

Suitable for patients with AMD

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2
Q

Hand Held Magnifier:

Functional Benefits

A

Convenient for spot use

Common so psychologically acceptable

Compact, light weight & portable

Flexible task distance

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3
Q

Hand Held Magnifier:

Functional Limitations

A

Requires steady hands

Requires training

Subject to aberrations when used binocularly

Higher powers produce more aberrations with smaller FOV

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4
Q

Hand Held Magnifier:

Advice on use

A

Place on page and pull away until image is clear

Keep page flat

Steady eye strategy

Good illumination - angle poised lamp directly on page

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5
Q

Stand Magnifier:

Features

A

Simple magnifier

Cuff to set lens at correct distance

Internally illuminated

Can be available as one handle with changeable heads

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6
Q

Stand Magnifier:

Functional Benefits

A

Easy to maintain correct working distance

Stand may hold in place, allowing hands free

Internally illuminated, providing correct lighting

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7
Q

Stand Magnifier:

Functional Limitations

A

Fixed focus - specific specs may be required

Bulkier due to illumination

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8
Q

Stand Magnifier:

Advice on use

A

Place directly on page for focus

Use with reading specs

Keep page flat

Ensure batteries replaced frequently

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9
Q

Bar Magnifier:

Features

A

Simple loupe magnifier

Single plus lens

Acrylic or perspex

Can sit directly on age

May have line to aid tracking

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10
Q

Bar Magnifier:

Functional Benefits

A

Simple to use

No dexterity issues

Can maintain binocular vision

Cheap

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11
Q

Bar Magnifier:

Functional Limitations

A

Requires flat, firm surface

Narrow field of view

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12
Q

Bar Magnifier:

Advice on use

A

Position horizontally, directly on reading material

Use line to guide position

Use with near specs

When not in use, keep in case and out of direct sun

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13
Q

Pocket Magnifier:

Features

A

Simple magnifier

Single plus lens

May have multiple lenses in once case

Pocket size

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14
Q

Pocket Magnifier:

Functional Benefits

A

Small, portable and discreet

Lightweight

Psychologically and cosmetically acceptable

Cheap

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15
Q

Pocket Magnifier:

Functional Limitations

A

Small FOV

Not for prolonged use

Steady hand required

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16
Q

Pocket Magnifier:

Advice on use

A

Hold on material and bring away until clear

Use with distance specs

Bring closer to eye for increased FOV

For short tasks only

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17
Q

Prismatic Readers:

Features

A

High powered reading specs

Incorporate base IN prism to aid convergence

Usually half eye

Available up to +10 with 12 prims

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18
Q

Prismatic Readers:

Functional Benefits

A

Can maintain BV for near task with high adds

Half eye allows simultaneous distance vision

Hands free

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19
Q

Prismatic Readers:

Functional Limitations

A

Short working distance

Heavy and unattractive

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20
Q

Prismatic Readers:

Advice on use

A

Wear for specific near tasks only

Close working distance, start with page away and bring closer

Good illumination

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21
Q

Spectacle Mounted Telescope:

Features

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A

Galilean system

Positive objective and negative eyepiece

Can have adjustable focus

Can be permanently fused, or clip on

22
Q

Spectacle Mounted Telescope:

Functional Benefits

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A

Variable working distance

Only reasonable solution for distance magnification

Hands free

Good depth of field

23
Q

Spectacle Mounted Telescope:

Functional Limitations

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A

Psychologically unacceptable

Heavy and bulky

Accurate centration is essential

Small field of view

24
Q

Spectacle Mounted Telescope:

Advice on use

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A

Use for specific tasks

Can adjust focus depending on working distance

Do not walk around when using

Requires good illumination

25
Monocular Hand Held Telescope: Features
May be keplarian or galilean Hand held and monocular May clip to specs frame May have adjustable focus
26
Monocular Hand Held Telescope: Functional Benefits
Handheld, small and portable Adjustable focus for range of working distances Can clip on to specs for hands free High mag available
27
Monocular Hand Held Telescope: Functional Limitations
Stead hand required Dexterity required Only good for stationary objects Monocular so not for prolonged use
28
Monocular Hand Held Telescope: Advice on use
Adjustable eyepiece to focus Use for specific spot tasks as mono use Use with dominant eye Hold steady, may require elbow support
29
Spectacle Mounted Magnifier: Features
Plus powered lens mounted or clipped on specs Patient's own Rx can be glazed into housing specs May be binocular or monocular
30
Spectacle Mounted Magnifier: Functional Benefits
Good field of view Coating and tint available to carrier lens Hands free BV can be maintained
31
Spectacle Mounted Magnifier: Functional Limitations
May be psychologically unacceptable Short working distance difficult to maintain Accurate centration is essential Poor illumination - extra required
32
Spectacle Mounted Magnifier: Advice on use
Hold page away and bring closer Use for specific near tasks Do not walk around in when wearing Good illumination required
33
Max TV Unit or Coil Distance Unit: Features
Galilean telescope system Adjustable focus for room distance use Frosted objective lens housing eliminates reflections
34
Max TV Unit or Coil Distance Unit: Functional Benefits
Simple and economic solution Can be used for DV and some IV Hands free
35
Max TV Unit or Coil Distance Unit: Functional Limitations
Obvious - psychologically unacceptable Heavy and uncomfortable for long wear Requires dexterity for adjustments Cannot compensate a high Rx
36
Max TV Unit or Coil Distance Unit: Advice on use
Use for specific task Demonstrate adjustment of working distance Do not walk when wearing
37
Sheet Magnifier: Features
Fresnel lens Multiple concentric rings providing magnification Can have foldable stand for support
38
Sheet Magnifier: Functional benefits
Large field of view due to size Cosmetically acceptable Inexpensive Light and easily portable
39
Sheet Magnifier: Functional Limitations
Only available in low magnification Posture sometimes difficult to maintain Optically poor due to aberrations
40
Sheet Magnifier: Advice on use
Hold on page and move away until clear Use with near vision specs Keep page flat Good illumination
41
Chest Magnifier: Features
Low magnification plus powered lens Bracket and neck strap to support against chest May have smaller, high mag segment
42
Chest Magnifier: Functional Benefits
Constantly supported at the required working distance Hands free Low magnifications, means less aberrations and wider FOV Inexpensive
43
Chest Magnifier: Functional Limitations
Only low magnifications available Move with patient, must stay still Not ideal for patients with neck problems as heavy
44
Chest Magnifier: Advice on use
Place at task then move up until clear Position closer to eyer for wider FOV and read specs for increased mag Use while seated May require additional lighting
45
Hyperocular: Features
Spectacle mounted magnification Single high powered plus lenticular Other ens occluded or frosted Patient's Rx can be included
46
Hyperocular: Functional Benefits
Psychologically more accepted Able incorporate prescription Hands free Large FOV due to short eye-mag distance
47
Hyperocular: Functional Limitations
Short working distance difficult to maintain Monocular only Required good illumination due to short distance
48
Hyperocular: Advice on use
Hold page in front of dominant eye and bring closer until clear Use for specific tasks Do not walk around wearing Use good lighting - angle poised lamp
49
Tinted Overspectacles: Features
Plano tinted/filter lenses Wrap around design shields against disability glare Provide UVA and UVB protection Specific filters absorb certain wavelengths
50
Tinted Overspectacles: Functional Benefits
Light weight Able to use with own specs May filter options Wrap around shields from glare
51
Tinted Overspectacles: Functional Limitations
Bulky and unattractive Only of benefit in daylight Depending on filter, can restrict driving
52
Tinted Overspectacles: Advice on use
Wear over existing specs if required Wear in bright conditions or if light problem Do not wear when driving due to contrast filters

ABDO FQEs (5 decks)

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