 will result in the above Cooke triplet
prescription becoming the current lens. If you make mistakes during
this input, don't worry. We will fix errors using the UPDATE LENS
level in the next lesson. If you wish to stop during this input
process and start over, just issue an <strong>EOS</strong> command and
then repeat the input of these following commands. Issue each of the
next commands from the keyboard:</p>

<p>
<strong>
  LENS<br>
  LI, COOKE TRIPLET U.S.# 2,453,26Ø <br>
  UNITS MM<br>
  SAY 18.4735<b