 look up and try out the
lens library commands <strong>LIB P</strong> and
<strong>LSTAT</strong>. This is the end of Lesson #1. In Lesson #2, we will learn how
to list and modify the lens system we just entered using the UPDATE
LENS mode.</p>


<h2>Lesson #2 - Listing and modifying the "current lens"</h2>

<p>In the first lesson, we learned how to use the LENS INPUT mode to
input a lens prescription and how to save what we input to the lens
library. If you are among the 99.99% of us who are not perfect, you