Quiz 2 - Terminology Flashcards
The Horizontal Plane is parallel with…
a. the Datum Line
b. the Geometric Center of the Frame
c. the Longest Radius
d. the “B” measurement
a. the Datum Line
The point of the lens at which both the front and back surfaces are parallel.
a. Optical Center
b. Geometric Center
c. Mechanical Center
d. Prism Reference Point
e. Distance Between Centers
a. Optical Center
The measured distance between the geometric centers of both eye wires.
a. Distance Between Centers
b. Optical Center
c. Geometric Center
d. Mechanical Center
e. Prism Reference Point
a. Distance Between Centers
The point on the lens around which the lens is cut and edged.
a. Mechanical Center
b. Optical Center
c. Geometric Center
d. Prism Reference Point
e. Distance Between Centers
a. Mechanical Center
The cylinder power curve of a lens is also know as the…
a. Cross Curve
b. Finished Curve
c. Sphere
d. Base Curve
a. Cross Curve
The point on the lens where the prism equals that which is called for in the Rx.
a. Prism Reference Point
b. Optical Center
c. Geometric Center
d. Mechanical Center
e. Distance Between Centers
a. Prism Reference Point
Where are Power Curves found on the lens?
a. On the back surface
b. On the lens box
c. On the front surface
d. On the Rx
a. On the back surface
The Seg Inset of a lens refers to the relationship of which lens parameters?
a. The Distance PRP and the Near OC
b. The Mechanical Center and the Geometric Center
c. The Lens Center and the Lens Edge
d. The “A” and the “DBL”
e. The Mechanical Center and the Distance PRP
a. The Distance PRP and the Near OC
When surfacing a ______ lens blank is chosen.
a. Semi-finished
b. Finished
c. Plano
d. Plus
a. Semi-finished
A stocked lens already prepared with a power is known as a _______ lens.
a. Finished
b. Semi-finished
c. Plano
d. Plus
a. Finished
