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Contact Lens Series Volume 1.iso
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00138_Field_138.txt
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1997-10-28
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ASTIGMATISM PLOT
The first item on the list first asks
for the two meridians to be plotted,
usually you would want axes 180
degrees apart to get one meridian.
The arrow keys can be used to move
the arrow across the meridian to show
the values at the bottom of the screen.