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ABDO FQEs > D5 - Special Optical Appliances > Flashcards

D5 - Special Optical Appliances Flashcards

1
Q

Clip on Magnifier:

Design Features

A

Simple high powered plus lens

Available 3x binocular and 7x monocular

Flip up when not required

Hands free

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2
Q

Clip on Magnifier:

Dispensing/Fitting Requirements

A

Magnification required: Acuity achieved/Acuity desired

Clip over bridge of Px’s specs

Adjustable vertex distance for increased field of view

Demonstrate working distance

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3
Q

Clip on Magnifier:

Advice on use

A

Wear for specific near tasks

Hold task away and bring closer until clear

Close working distance

Good illumination required

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4
Q

Fresnel Prism:

Design Features

A

Temporary prism

Made from UPVC

Consists of multiple parallel prims 1mm thick

Available up to 30 prism D

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5
Q

Fresnel Prism:

Dispensing/Fitting Requirements

A

Check prism base direction

Apply underwater to remove air bubbles

Apply to back surface of lens

Check VAs - can reduce VAs by 2 snellen lines

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6
Q

Fresnel Prism:

Advice on use

A

Wear as advised

Do not attempt to clean or rub back surface

Can be reapplied if required

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7
Q

Monocle:

Design Features:

A

Single lens held in aperture

Gallery gripped by orbicularis oculi

Gallery holds lens away from globe

Neck coed to prevent loss

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8
Q

Monocle:

Dispensing/Fitting requirements

A

Dispense to dominant eye

Dispense best vision sphere

Glaze with Trivex for safety

Glaze a flat form lens

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9
Q

Monocle:

Advice on use

A

Use with dominant eye

Use for specific tasks

Not used for prolonged tasks

Keep on cord to prevent loss

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10
Q

Half-eye Spectacles:

Design features

A

Shallow lens covering lower portion of orbit

Ideal for emmetropic presbyopes and CL wearers

Large distance between pad centres and long LTBs to allow to sit at end of nose

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11
Q

Half-eye Spectacles

Dispensing/fitting requirements

A

Adjust for lower frame fitting

Record near CD at specific working distance

Glaze OCs appropriately high

Record vertex distance

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12
Q

Half-eye Spectacles

Advice on use

A

Sit low on nose to allow distance vision over the top

Wear for specific tasks only

Remove spectacles to walk around

View distant objects over frame

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13
Q

Reading Spectacles:

Design Features

A

Older design includes full aperture frame with lens in bottom half only

Used for near or inter tasks

Glazed to full sph/cyl prescription

Ideal for emmetropic presbyopes and CL wearers

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14
Q

Reading Spectacles:

Dispensing/Fitting requirements

A

Adjust appropriately so lens sits at desired height

Order with full near or inter prescription

Record near CD at specific working distance

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15
Q

Reading Spectacles:

Advice on use

A

Wear for specific tasks only

Remove spectacles to walk around

View distant objects over lens

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16
Q

Recumbent Spectacles:

Design Features

A

Prism and mirrors mounted into frame to deviate light by 90 degrees

Prism displace image

Mirrors reflect image

Can be worn over existing spectacles

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17
Q

Recumbent Spectacles:

Dispensing/Fitting requirements

A

Ideal for bed bound patients or patients with stoops

Fit snug to avoid slipping

May require head strap to secure

Fit low and shallow to allow patients to look over

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18
Q

Recumbent Spectacles:

Advice on use

A

Wear to view objects below or above

Wear with spectacles if required

Take care if wearing when moving

Look over the top to see directly in front

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19
Q

Surgeon’s Spectacles:

Design features

A

Spectacle mounted telescope

Galilean telescope unit

Positive objective lens and negative eyepiece

Adjustable focus

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20
Q

Surgeon’s Spectacles:

Dispensing/Fitting requirements

A

Must accurately measure CDs

Measure working distance and CDs with frame in place

Some units have adjustable focus, may have to secure at appropriate focus

Some allow patient’s rx to be glazed into carrier

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21
Q

Surgeon’s Spectacles:

Advice on use

A

Demonstrate working distance

Wear for specific tasks

Do not move around when wearing

Requires good illumination, angle poised lamp directly onto task

22
Q

Safety Spectacles:

Design Features

A

Large frames with side shields

May be wrapped to protect from debris

Impact resistant lenses, sometimes chemical

Marked to conform with BSEN 166/167

23
Q

Safety Spectacles:

Dispensing/Fitting requirements

A

Ensure close fitting for adequate protection from debris

Frame and lenses specified by safety officer

Adjustments may be made in practice, but not repairs

24
Q

Safety Spectacles:

Advice on use

A

Wear for designated tasks

Do not remove side shields/interfere with device

Clean as specified by manufacturer

25
Q

Trigeminal Spectacles:

Design Features

A

Large frame provides peri-orbital protection following corneal sensitivity loss

Dark shields for light protection

NOT BS/EN marked

26
Q

Trigeminal Spectacles:

Dispensing/Fitting Requirements

A

Dispensed to patients with paralysis of trigeminal nerve

Side shields prevent debris as lack of corneal sensitivity

Tints reduce photophobia

27
Q

Trigeminal Spectacles:

Advice on use

A

Wear as and when required

Place in case

Clean with cloth and spray

28
Q

Ptosis Prop:

Design Features

A

Prop fitted to back plane of frame

Raises upper lid to keep pupil clear to provide adequate vision

Silicon covered as hypoallergenic

29
Q

Ptosis Prop:

Dispensing/Fitting requirements

A

Suitable plated metal frame select which fits in line with brow

Pre adjust before measuring

Measure from frame rim to orbit

30
Q

Ptosis Prop:

Advice on use

A

Use artificial tears if required

Ensure prop is fitted correctly and comfortably

Replace silicon covers if perishing

31
Q

Lundhi Loop:

Deign Features

A

Ideal for patients with droopy upper lids cause by facial paralysis

Loop is fitted to the back surface of the spectacle plane

32
Q

Lundhi Loop:

Dispensing/Fitting Requirements

A

Select suitable plated metal frame which fits in line with brow

Pre adjust frame

Fit non slip silicon pads

33
Q

Lundhi Loop:

Advice on use

A

Use artificial tears if needed

Ensure prop is fitting correctly and comfortably

Replace silicon covers if perishing

34
Q

Flip up Spectacles:

Design Features

A

Flip attached to top rim

Ideal for occupational use

Range of prescription & tint available

35
Q

Flip up Spectacles:

Dispensing/Fitting Requirements

A

Measure CDs with the frame

Visual Task analysis: identify requirements

Flip can be glazed with NV, IV, negative add or tint

36
Q

Flip up Spectacles:

Advice on use

A

Wear for specific tasks

Flip up lenses as required

Clean with cloth and spray

37
Q

Make up Spectacles (flip over):

Design Features

A

One spherical positive powered lens

Flip attached at nasal rim

Usually ready made

38
Q

Make up Spectacles (flip down):

Design Features

A

Glazed to single vision full sph/cyl rx

Flip attached at lower rim

Flip down to use lens

39
Q

Make up Spectacles:

Advice on use

A

Do not drive when wearing

Place in case

Clean with spray and cloth

Wear for specific tasks

40
Q

Make up Spectacles:

Dispensing/Fitting requirements

A

Usually used by hyperopes or presbyopes when applying makeup

Can be used by CL wears when inserting

Glazed with best sph or full Rx depending

41
Q

Reversible Spectacles:

Design Features

A

Spectacle frame with swivel joints

Can be worn either way round

Curl sides for secure fit

42
Q

Reversible Spectacles:

Dispensing/Fitting Requirements

A

Dispense to patients with monocular vision

Dispense trivex lenses for safety

Record mono CDs for DV and NV

43
Q

Reversible Spectacles:

Advice on use

A

Demonstrate how to flip around when changing tasks

Wear with appropriate lens in front of the dominant eye

Mark one side to easily identify which way around to wear for DV or NV

44
Q

Paediatric Spectacles:

Design Features

A

Manufacture from silicon

Moulds to the shape of baby’s face

No joints or screws for safety

Loop end sides w/ elastic head strap

45
Q

Paediatric Spectacles:

Dispensing/Fitting Requirements

A

Perform cover test, record CD’s

Dispense trivex lens for safety

Head strap to fit comfortably

46
Q

Paediatric Spectacles:

Advice on use

A

Explain importance of continuous wear to parents

Call in for regular fitting checks

Return if broken or damaged

Adaption advice

47
Q

Reading Spectacles:

Design Features

A

Full frame, half lens

For NV and IV

Glazed to sph/cyl single vision prescription

48
Q

Reading Spectacles:

Dispensing/Fitting Requirements

A

Generally worn by presbyopes requiring NV correction

Record near CDs

Maybe worn as readers over CL’s

Glazed to required prescription

49
Q

Reading Spectacles:

Advice on use

A

Wear for specific NV or IV task

Place in case

Clean with cloth and spray

50
Q

Frankling Split Lenses:

Design Features

A

Two completely separate lenses

Independent control of OCs

Obvious dividing line

Can be supplied with prism correction in either distance or near portion

51
Q

Frankling Split Lenses:

Dispensing/Fitting Requirements

A

Dispense a plastic frame for endurance

Avoid spring loaded sides as this puts pressure on the lenses and they may pop out

Usually fit them lower lens at lower limbus

52
Q

Frankling Split Lenses:

Advice on use

A

Take care when cleaning as lenses can fall out

Place in the case

Clean with a cloth and spray

ABDO FQEs (5 decks)

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