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Ophthalmic Optics Block 9 > Tools > Flashcards

Tools Flashcards

1
Q

Adjustment tools

A
  • Nose pad pliers
  • Single/double nylon jaw pliers
  • axis adjustment pliers
  • needle nose pliers
  • screwdriver sets
  • drill mount kit
  • pupilometer
  • hot air frame warmer
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2
Q

Pupilometer

A

Measures PD
Can be set at different distances
Not good for tropias or someone with a facial deformity

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3
Q

Hot air frame warmer

A

Adjust plastic frames

Hot and cold

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4
Q

Ultrasonic cleanser

A

Cleans glasses and jewelry
High frequency pressure
-Should not put AR coating lenses in the ultrasonic cleansers
-coatings are very dense so water can be absorbed within the film if it is left in too long and cause it to loose adhesion and color shifts in the lens

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5
Q

Traditional surfacing

A

Rx is ground and polished into a lens using a pre made tool for the given Rx
Must stock semi finished progressive lens and bifocals and add power

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6
Q

Digital surfacing

A

Ability to tailor to suit an individual prescription

More options

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7
Q

Surfacing equipment

A 
Axis marker 
Blocker 
Generator 
Finer 
Polisher 
Coater
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8
Q

Measures the dioptric power of lens

A

Lens clock

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9
Q

How to calibrate the lens clock

A

Place it on flat surface, should read 0

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10
Q

Error in a lens clock

A

If you are not completely perpendicular, even just 10 degrees off will cause an error of 2D

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11
Q

What is the red readings on a lens clock

A

Back surface

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12
Q

What is the black numbers on a lens clock

A

Front surface

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13
Q

What is a lens clock designed for

A

Materials like glass with an index of 1.53

-any other RI will cause an alter in the reading

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14
Q

When rotating the lens clock on the front surface of a lens, all meridians read +3.00D. When rotating the lens clock not he back surface, the clock reads -5.75D. What is the nominal power

A

Front=+3.00D
Back= -5.75

Nominal= -2.75

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15
Q

Checking a bifocal with a lens clock

A

Read the front surface on the top of the lens and then the front surface on the bifocal part, and take the difference

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16
Q

When rotating the lens clock on the front surface of a lens, all meridians read +6.50D. On the back surface the clock reads -7.50D along the 180 meridian and -6.00D along the 90 degree meridian. What is the nominal power of the lens

A

+0.50 -1.50 x 090

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17
Q

Measuring the thickness of the lens, good for inspections

A

Thickness calipers

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18
Q

What odo you measure the thickness on in the plus lens

A

Edge

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19
Q

What part of a minus lens do you measure the thickness

A

Middle

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20
Q

How do you decipher all the symbols on a progressive lens

A

Progressive lens identifier book

21
Q

4 point alignment

A

Off-face
-sitting the frames on the table and making sure all 4 points touch the table and when you flip them upseide down they should do the same

22
Q

How to start adjustments

A

Always start from front and center, and work your way around and out

23
Q

X-in

A

Vertical misalignment

24
Q

Temporal spread

A

Temples should be almost perpendicular to the frame front, 90-95 degrees

25
Q

Temple fold

A

Temples should fold parallel and symmetrical to each other and should cross at the center of the frame

26
Q

Nose pads

A
  • frontal, splay, and vertical

- tops of them should be closer than the bottoms, should follow the eye wire line

27
Q

Faceform and wrap

A

Slightly rounded to the form of the face

28
Q

Moving nose pads in

A

Lifts the frame up

29
Q

Moving the nose pads out

A

Drops the frame

30
Q

Fixing the temples

A

If the frame is too far down, move that same temple down to move it up and vice versa

31
Q

Pantoscopic tilt

A

Lower rim tilted towards the face

4-18 degrees (usually 7-10 most commonly)

32
Q

Retroscopic tilt

A

Bottom of frame angled out

33
Q

Vertex distance/wrap

A

Make sure they are sitting even side to side from each eye

  • affects horizontal displacement
  • 12-14mm
  • have them look down and look through the top of the glasses
  • adjust the temples
34
Q

Temple bend

A

Over the ear
Into the head

Most important 2 things

35
Q

Full frame

A 
Goes all the way around 
Sturdy
Lens fits into a beveled edge 
Allows you to hide thick lenses 
Allows to get a thinner lens though 
Good for stronger lenses
36
Q

Semi-rimless

A

Frame on top, wire on the bottom

Putting a groove into the lens and tightening the wire into it

37
Q

Drill mount or 3 piece or rimless

A

Drilling into the lens to mount the frame
Very fragile
Not for strong RX
Can loosen easily if taking them on and off a lot
Very light weight

38
Q

Inline frames

A

Hybrid of semilrimelss and a full frame

-acts like a semi rimless but goes into a full frame

39
Q

Combination hybrid

A

Combination of materials

40
Q

What material in frames contains nickel

A

Monel

41
Q

What frame material contains copper

A

Monel

42
Q

What is in hinges, inner core or temples

A

Nickel silver

43
Q

Monel

A

Has nickel in it, so cannot give it to people with allergies

  • Durable
  • cheaper
  • most common material
44
Q

For allergie, what frame material is a good option

A

Titanium

45
Q

Flexon

A

Trade marked
Very flexible
Titanium based alloy

46
Q

Plastic frame material

A 
ZYL
Most common plastic frame 
Lower cost and allow for trendier looks 
Easier to break 
Sunlight can damage it
47
Q

Some other materials

A 
Silver 
Gold
Wood
Bone
Horn 
Tortoise shell 
Leather 
Semi-precious and precious stones
48
Q

Allergies to materials

A

Usually caused my nickel
They will request titanium frames if they already know
Sometimes they do not know and will come in with a reaction

Nose pads: some people are allergic to silicone.

Ophthalmic Optics Block 9 (3 decks)

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