Bifoclas Flashcards
0
Q
What is the equation to find Fb?
A
Fb=F1-AK
1
Q
What is the equation to find Fc?
A
Fc= F1-(AK)
2
Q
What is the ratio to find K?
A
K= nm-1
—–
ns-nm
3
Q
How to find Fs
A
Fs= A(K+1)
4
Q
How to work out Ts
A
Ts= Y(sq)x F
———-
200(n-1)
5
Q
Hot to find ts(top)
A
Ts(top) =Ts-s’
6
Q
What are the three different equations for back surface segs?
A
Fc= F2-AK
Fb=Fc+F1
Or
Fb=F-AK
