<story><title>Femtosecond lasers create 3D midair plasma displays you can touch (2015)</title><url>https://spectrum.ieee.org/femtosecond-lasers-create-3d-midair-plasma-displays-you-can-touch</url></story><parent_chain><item><author>cyberax</author><text>I have a slight eye damage in one eye from working with lasers that were just a bit outside the safe limits. And I realized that only years after getting it.&lt;p&gt;So the last thing I want, is to be near unconfined lasers powerful enough to ionize the air.</text></item></parent_chain><comment><author>rolandog</author><text>&amp;gt; So the last thing I want, is to be near unconfined lasers powerful enough to ionize the air.&lt;p&gt;I wholeheartedly agree.  Just thinking about how the potentially-unregulated cheaply-manufactured knock-off projectors will result in having to wear welding glasses when walking around the street to avoid being blinded by the 3D advertisements that are being shot at your face...</text></comment>
<story><title>Femtosecond lasers create 3D midair plasma displays you can touch (2015)</title><url>https://spectrum.ieee.org/femtosecond-lasers-create-3d-midair-plasma-displays-you-can-touch</url></story><parent_chain><item><author>cyberax</author><text>I have a slight eye damage in one eye from working with lasers that were just a bit outside the safe limits. And I realized that only years after getting it.&lt;p&gt;So the last thing I want, is to be near unconfined lasers powerful enough to ionize the air.</text></item></parent_chain><comment><author>qwertox</author><text>I think the same happened to me with LEDs. I have an odd feeling that I can&amp;#x27;t really see a small section somewhere close to the center of focus, not directly at it. I remember an odd sensation in the eye for days after dealing with a white LED.</text></comment>