6 - Troubleshooting Frame Adjustments & Repairs

Question 1

What are the 3 points of the fitting triangle?

Answer 1

The roots of each ear
Nose

Question 2

What happens when the temples aren’t spread enough? 2

Answer 2

Pressure on the side of the head
Frame will fall forward on the nose

Question 3

What will a px say if the temples aren’t spread enough? 2

Answer 3

Slide down their nose
Hurt behind their ears

Question 4

What causes the temples to spread too much? 3

Answer 4

Older frame stretches over time
Sleeping in glasses
Wearing them on their head

Question 5

What will a px say if the temples are spread too much? 2

Answer 5

Falling off
suddenly too big

Question 6

What is the solution to inequality in vertex distance? Left + Right 4

Answer 6

If left lens is IN = bring left temple IN
If right lens is OUT = bring right temple OUT
If right lens is IN = bring right temple IN
If left lens is OUT = bring left temple OUT

Question 7

What will a px feel if their in inequality in the vertex distance?

Answer 7

The side the temple is not spread enough will cause a sore ear and the opposite side of the nose will hurt.
Clothes pin effect by pinching the face

Question 8

What will a px say when the frames touch their cheeks? 2

Answer 8

Lenses are dirty (because they are touching the face)
Touching my face

Question 9

How can we stop/avoid glasses touching the checks? 3

Answer 9

Get px to smile when choosing to see if it will be a problem
Plastic frame - use stick on pads
Metal frame - nosepads can be at the same angle but moved lower which raises the frame

Question 10

What can cause glasses to be lop-sided? 2

Answer 10

Sat on them
Stepped on them

Question 11

What should be checked if the frames are lop-sided? 4

Answer 11

Hinge is not broke/loose
Skewing at the bridge
See if their is a gap between the temple butt end and the frame front
Temple bend

Question 12

What is the solution when the lenses are different heights? Right + left 4

Answer 12

If left lens is UP = bend left temple UP
If left lens is DOWN = bend left temple DOWN
If right lens is UP = bend right lens UP
If right lens is DOWN = bend right temple DOWN

Question 13

If the temple bend is a problem affecting the height of the lenses what should you do/

Answer 13

Check to see which bend occurs too short of the root of the ear
heat it and straighten
Rebend in a more appropriate place

Question 14

What happens to a px’s vision when the glasses sit too high or too low? 4

Answer 14

No longer looking through Optical centre, this will induce unwanted prism - double vision / objects appear taller or shorter.

Question 15

What is the relationship between the nosepads and the height of the lenses?

Answer 15

Widen the nosepads = lowers glasses
Narrow the nosepads = heightens glasses

Question 16

What 3 adjustments can be done to move the frame away from the face/eyes?

Answer 16

1.Narrow nosepads (also raises frame).
2.Increase effective length of pad arms.
3.Decrease face form (make frame front straighter).

Question 17

What 3 adjustments can be done to move the frame closer to the face/eyes?

Answer 17

1.Spread nospads apart (also lowers frame).
2.Decrease effective length of pad arms.
3.Increase face form (make front more curved).

Question 18

What 3 adjustments can we do to move the frame off the cheeks?

Answer 18

1.Decrease pantoscopic tilt.
2.Raise the frame by narrowing the distance between pads
3.Increase vertex distance by narrowing distance between pads or extending the effective length of the pad arms.

Question 19

What 3 adjustments can we do to move the frame off the brows?

Answer 19

1.Increase pantoscopic tilt.
2.Lower the frame by widening the distance between pads.
3.Increase vertex distance by extending pad arm effective length - this may raise the glasses

Question 20

What 3 adjustments can be done to move the frame higher on the face?

Answer 20

1.Narrow the distance between adjustable pads.
2.Lower the vertical position of adjustable pads.
3.Add pads to plastic bridge

Question 21

What 2 adjustments can be done to move the frame lower on the face?

Answer 21

1.Increase the distance between adjustable pads.
2.Raise the vertical position of adjustable pads.

Question 22

What is pantoscopic tilt?

Answer 22

pantoscopic tilt is the amount the frame front is tilted with reference to the plane of the face

Question 23

What is the rule when measuring OC’s in regard to pantoscopic tilt? 2

Answer 23

A correctly fit pair of glasses will drop the optical center 1mm for every 2 degrees of pantoscopic tilt
Should never be lowered to be under datum line

Question 24

What kind of tilt is needed in these conditions:
Eyes at OC =
Eyes above OC =
Eyes below OC =

Answer 24

= No Pantoscopic tilt
= Pantoscopic tilt required
= Retroscopic tilt needed (not done in practice/new frame choice)

Question 25

As a general rule, eyeglasses need to be adjusted so that the lower rims of the frame are closer to the face. This widens the viewing area for the wearer and is more cosmetically appealing. T/F

Answer 25

True

Question 26

If the bifocal segment is too high what should you do to the tilt?

Answer 26

Increase the pantoscopic tilt

Question 27

If the oc height is too low how do you adjust the panto tilt to help ?

Answer 27

decrease the pantoscopic tilt (not practical)

Question 28

What should we look at when we check fit? 3

Answer 28

Width
Nose
Temple

Question 29

What are 3 fitting considerations when fitting a progressive/bifocal?

Answer 29

A minimal vertex distance.
An adequate pantoscopic tilt.
Sufficient vertical depth in the nasal portion of the frame shape.

Question 30

What are the 3 types of nosepads?

Answer 30

Silicone
Acetate
Vinyl

Question 31

Characteristics of silicone nosepads? 3

Answer 31

Grippy
Pulling sensation on nose
dont slide compared to others

Question 32

Characteristics of vinyl nosepads? 3

Answer 32

Soft
Flexible
Not as grippy frames may slip

Question 33

Characteristics of acetate nosepads? 2

Answer 33

Hard Material
Does not flex