title: Cardboard - Uncomfortable VR on somes smartphones
body: <p>I experience some uncomfortable behaviour when launching google cardboard app on some smartphones.</p>
  
  <p>On Nexus 5, the experience is ok and i get a nice 3D effect when looking inside the cardboard but on Samsung S3 and Sony Xperia S the experience is very uncomfortable.</p>
  
  <p>I did a comparison of the images produced by both phones and here is the result :</p>
  
  <p><a href="https://i.stack.imgur.com/2VjOQ.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2VjOQ.jpg" alt="enter image description here"></a><br>
  <sub>(source: <a href="https://numix.fr/VR_difference.jpg" rel="nofollow noreferrer">numix.fr</a>)</sub>  </p>
  
  <p>As you can see, on the top image (Nexus 5) the image produced by the 2 cameras is slightly different resulting in a convincing VR experience.</p>
  
  <p>On some other phones (Samsung S3, Sony Xperia S) i have a huge difference between the left and right image, resulting in a very uncomfortable VR : its impossible to see the objects in 3D.</p>
  
  <p>I can't figure out why there is such difference between phones.</p>
  
  <p>For info, My Nexus 5 is on Android 5.1.1, Samsung Galaxy S3 is on 4.1.1 and Sony Xperia is on 4.1.2.</p>