Two people wear the 3D glasses.
<a href="https://zh.wikipedia.org/wiki/User:TraineeCupid" class="extiw" title="zh:User:TraineeCupid">TraineeCupid</a>
<span class="int-own-work" lang="en">Own work</span>, and transferred from Chinese Wikipedia (<a class="external free" href="https://zh.wikipedia.org/wiki/File:3d_glasses.jpg">https://zh.wikipedia.org/wiki/File:3d_glasses.jpg</a>)