UNIT ONE - % Of Cyl Flashcards
1
Q
0° away is how much % of cyl felt ?
A
0% cyl
2
Q
30° away is how much % of cyl felt ?
A
25% cyl
3
Q
45° away is how much % of cyl felt ?
A
50% cyl
4
Q
60° away is how much % of cyl felt ?
A
75% cyl
5
Q
90° away is how much % of cyl felt ?
A
100% cyl
6
Q
Find the power at 90 of the rx below:
-2.00-4.00x045
A
-4.00
BREAKDOWN:
How many degrees away from 90 is 45° ? 45 How much is the cyl at 45? 50% What is 50% of the cyl? -2.00 Add the amount felt at cyl and sphere -4.00 ( -2.00+-2.00)
7
Q
What is the theta-(sine)^2 formula?
A
% of cylinder power is equal to (theta * sine)^2
8
Q
What does theta represent?
A
Number of degrees away from 90
9
Q
Using a calculator, what is the percent of cylinder power if theta is equal to 45?
A
50%
Plug in your calculator the cylinder power formula.
% CP = theta sine ^2
Input 45 in place of theta, click sin and then squared
