Unit 1-Multifocals Flashcards
0
Q
On a lens blank. Bifocal lens segment “inset” is referenced by the?
A
Distance MRP
1
Q
When using a lens protracted the lens is referenced?
A
Concave side up
2
Q
Round lens segments are placed on axis by?
A
Lensometer marks
3
Q
A layout blocker includes…
A
a segment aligning guide
4
Q
Flat top trifocal lenses are decentered horizontally and vertically in the same manner as…
A
Bifocal lenses.
5
Q
Normal multi focal decentration can not have…
A
Decentration for prism
6
Q
The reference point on a lens or flat top lens with vertical decentration is…
A
Segment top
7
Q
The intersection of the horizontal and vertical lines on a layout grid represent….
A
The frame GC
8
Q
The position of the MRP and NEAR OC is equal to…
A
The patients convergence.
9
Q
Layout blockers decenter right lenses “in”…
A
To the right.
