Flashcards in Lab #3 Deck (50)
What are examples of Frame (Bench) Alignment Elements?
- 4-Pt touch
- Pantoscopic Angle
- Facial Wrap Angle
- Set Back Angle
- Nose Pad Angles
- Temple Parallelism
- Temple Fold Angle
What is the Pantoscopic angle?
Angle of the frame front relative to the temple
The Pantoscopic Angle is usually
The Pantoscopic Tilt is relative to
The horizontal eye axis
Set-back angle (let-back angle) refers to the
How much of a Pantoscopic Tilt should there be?
8 to 12˚ of tilt
Salt Pans heat up to which temperatures?
130 - 400˚F
Air Blowers heat up to which temperatures?
158 - 266˚
What is the temperature range for heating up Nylon?
455 - 491˚
What is the temperature range for heating up Polycarbonate?
297 - 311˚
What is the temperature range for heating up Optyl?
175 - 425˚
What is the temperature range for heating up Proprionate?
176 - 239˚
What is the temperature range for heating up Acetate?
176 - 212˚
What is the temperature range for heating up Polyamide?
122 - 176˚
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
When you receive your patient's prescription glasses from the laboratory you must verify:
- Accuracy of prescription
- Frame specifications
- Lens Material
- Lens Tint / Coating
Pre-alignment insures that you have detected any
Minor flaws present in the fabrication of the glasses by the lab
What three areas of the frame should rest or make contact with the patient?
- Both temples
What three areas should be observed prior
to adjusting a frame?
- Bridge Area
- Temple Hinge
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
X-ing refers to the
Alignment of the two eye wires as viewed from the side
What is the 1st step in frame alignment?
What is the 2nd step in frame alignment?
Pantoscopic angle is the relationship between the
Frame front and temples
The frame front is typically angled about 5 to 7 degrees where?
Towards the patient's cheek from the vertical plane
What is the 3rd step in frame alignment?
The facial wrap relates to how the
Frame contours to the front of each patient’s face
The average wrap angle for most day to day wear
frames is approximately
6 - 8˚
What is the 4th step in the frame alignment process?