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Axis of the streak is 1200
Lens used is -1.00DS |
Axis of the streak is 300
Lens used is +0.50DS |
a. Draw the power cross taking into account
the working distance.
Remember that
the power is 90 degrees to the axis and a working distance of 2/3
meters is equivalent
to -1.50DS. The power cross is as below:
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