View through a progressive glass at some distance. In normal use, a much smaller section of the glass is used, so that the distortion is much smaller.<br>(This photo was made using a standard camera (Fujifilm S5500), with a 3 dpt reading glass held in front of it as a close-up lens.)
<a href="//commons.wikimedia.org/wiki/User:HHahn" title="User:HHahn">HHahn</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>