<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>RcouF1uZ4gsC</author><text>&amp;gt; The method we developed images the eye multiple times to see whether it’s actually responding to changes in brightness&lt;p&gt;Hopefully the person does not have Argyll Robertson pupils &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Argyll_Robertson_pupil&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Argyll_Robertson_pupil&lt;/a&gt; which is seen in late stage syphilis and causes the pupil not to react to the light.&lt;p&gt;Also, another thing is that they should make sure that they train their system with dark eyed people. Often the iris is very easy to identify if people with light colored eyes. In people with dark eyes, it may be more difficult.</text><parent_chain></parent_chain></comment><story><title>How to Teach an Iris Scanner That the Eye It’s Looking at Is Dead</title><url>https://spectrum.ieee.org/biomedical/imaging/how-to-teach-an-iris-scanner-that-the-eye-its-looking-at-is-dead</url></story>
<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>dahartigan</author><text>Wouldn&amp;#x27;t it be trivial to detect a pulse with IR similar to how it&amp;#x27;s done with other devices?</text><parent_chain></parent_chain></comment><story><title>How to Teach an Iris Scanner That the Eye It’s Looking at Is Dead</title><url>https://spectrum.ieee.org/biomedical/imaging/how-to-teach-an-iris-scanner-that-the-eye-its-looking-at-is-dead</url></story>