Chapter 8 II Flashcards
What are variant planes out of coplanar alignment
It’s a vertical misalignment in which lens are parallel, but one lens is father forward than the other
What’s the open temple spread / let-back
The angle that each open temple forms in relationship to the front of the frame
Which temple degrees are too far for standard alignment
95+
The normal condition of a temple is to
Open out slightly farther than 90
Overspreading temples can be fixed by
Heating the endpiece and bending it around the temple
In the pantoscopic angle,
The lower rims of the frame front are closer to the face than the upper rims
A proper pantoscopic angle may vary from
4-18 degrees
Incorrect temple parallelism will result if the
Endpiece if not straight, there is a bend in the temple shaft, the bridge has been twisted, there is a loose or broken hinge
Due to human head conformation, the temple ends should be
Bent onwards
Temples should be symmetrical and
Cross each other in the center of the frame
What are finger-piece pliers
Pliers have jaws that are parallel and have space between jaws when fully closed
What tool is used for a variety of adjustments
Pliers
What is used to analyze the symmetry of the face front
The four point touch
What basic angles are used for reference when aligning notepads
- Frontal angle
- Splay angle
- Vertical angle
The frontal angle refers to the
Vertical position of pads in relation to one another when viewed from the front