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VS 203A: Optics > Lab #3 > Flashcards

Flashcards in Lab #3 Deck (50)
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1

What are examples of Frame (Bench) Alignment Elements?

- 4-Pt touch
- X'ing
- Pantoscopic Angle
- Facial Wrap Angle
- Set Back Angle
- Nose Pad Angles
- Temple Parallelism
- Temple Fold Angle

2

What is the Pantoscopic angle?

Angle of the frame front relative to the temple

3

The Pantoscopic Angle is usually

5-7 degrees

4

The Pantoscopic Tilt is relative to

The horizontal eye axis

5

Set-back angle (let-back angle) refers to the

Temple Flair

6

How much of a Pantoscopic Tilt should there be?

8 to 12˚ of tilt

7

Salt Pans heat up to which temperatures?

130 - 400˚F

8

Air Blowers heat up to which temperatures?

158 - 266˚

9

What is the temperature range for heating up Nylon?

455 - 491˚

10

What is the temperature range for heating up Polycarbonate?

297 - 311˚

11

What is the temperature range for heating up Optyl?

175 - 425˚

12

What is the temperature range for heating up Proprionate?

176 - 239˚

13

What is the temperature range for heating up Acetate?

176 - 212˚

14

What is the temperature range for heating up Polyamide?

122 - 176˚

15

The objective in dispensing a pair of spectacles is to

Adjust the spectacles to make them as
comfortable as possible while maintaining the correct alignment

16

When you receive your patient's prescription glasses from the laboratory you must verify:

- Accuracy of prescription
- Frame specifications
- Lens Material
- Lens Tint / Coating

17

Pre-alignment insures that you have detected any

Minor flaws present in the fabrication of the glasses by the lab

18

What three areas of the frame should rest or make contact with the patient?

- Bridge
- Both temples

19

What three areas should be observed prior
to adjusting a frame?

- Bridge Area
- Temple Hinge
- Temples

20

The 4–point touch refers to the situation where

Both eye wires and the crest of each temple rests on a flat surface when the frame is placed upside down

21

X-ing refers to the

Alignment of the two eye wires as viewed from the side

22

What is the 1st step in frame alignment?

4-PT Touch

23

What is the 2nd step in frame alignment?

X'ing

24

Pantoscopic angle is the relationship between the

Frame front and temples

25

The frame front is typically angled about 5 to 7 degrees where?

Towards the patient's cheek from the vertical plane

26

What is the 3rd step in frame alignment?

Pantoscopic Angle

27

The facial wrap relates to how the

Frame contours to the front of each patient’s face

28

The average wrap angle for most day to day wear
frames is approximately

6 - 8˚

29

What is the 4th step in the frame alignment process?

Wrap Angle

30

The Set-Back Angle (Temple Flair) is seen from the

Top of the frame