https://play.google.com/store/apps/details?id=com.leftrightstereo.nejc.leftrightstereo&hl=en_US&gl=US
Left Right - Stereo Test - Apps on Google Play
If you have unmarked earbuds or often use them in the dark, this app is for you.
left rightstereo teston googleappsplay
https://science.nasa.gov/photojournal/stereo-view-of-phoenix-test-sample-site/
Stereo View of Phoenix Test Sample Site - NASA Science
Sep 24, 2025 - This anaglyph image, acquired by NASA's Phoenix Lander's Surface Stereo Imager on June 1, 2008, shows a stereoscopic 3D view of the so-called 'Knave of Hearts'...
test samplestereoviewphoenixsite