Extra Questions for Module 8
Optical Cross and Flat Transposition
Each worksheet is different, because each one was originally written by a different person.  Use the directions at the beginning of each worksheet for that worksheet.

Optical Cross
Put the following Rx's on the optical cross:
 
 
1.  +3.50
2.  -1.00 -1.00 x 180
3.  +0.50 -2.00 x 030
4.  -1.00 +1.00 x 080
5.  -1.00 +3.00 x110
6.  +8.75 -2.25 x005
7.  -16.75 -2.00 x179
8.  -16.75 +2.00 x005
9.  -0.75 +1.00 x092
10.  -1.62 +1.75 x115
11.  +0.25 -0.50 x135
12.  pl -0.50 x058

Optical Cross
Determine the following Rx's in minus cylinder form.
 
 
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.

Optical Cross

Determine the following Rx's in plus cylinder form.
 
 
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.

Flat Transposition

Flat transpose the following Rs's:

1.  +3.50

2.  -1.00 -1.00 x180

3.  +0.50 -2.00 x030

4.  -1.00 +1.00 x080

5.  -1.00 +3.00 x110

6.  +8.75 -2.25 x005

7.  -16.75 -2.00 x179

8.  -16.75 +2.00 x005

9.  -0.75 +1.00 x092

10.  -1.62 +1.75 x115

11.  +0.25 -0.50 x135

12.  pl -0.50 x058

13.  -4.25

14.  pl +3.75 x053

15.  +0.25 -0.50 x145

16.  +0.25 -0.25 x135

17.  +22.50 -3.50 x058

18.  -0.25 -0.50 x033

19.  +1.00 -2.00 x090
 

The answers are here.  Please do them yourself before you go to the answers.  If you understand it all and you don't need the practice then it will only take you a few minutes to do them.  If you are struggling with the formulas do one or two, check them, do a few more, check them, . . . just make sure that you do not look ahead of the ones that you did and are checking.

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