0 (the entire
lens). The next command targets the 3rd order spherical aberration to
0.0 with a weight of 1. Finally, <strong>EOS</strong> saves these
definitions and causes a return to the CMD level. Next, set up the
variables with the following commands:</p>

<p><strong>
    VARIABLES<br>
    CV 8<br>
    CC 8<br>
    EOS<br>
</strong></p>

<p>The first command causes the program to enter Variables creation
mode. The next two commands define the curvature and conic constant of
surface 8 to be variables. Fi