When observing 3D images through a viewer or specialized glasses, the optical mechanism ensures that the left eye perceives only the image designed for it, while the right eye sees its corresponding image. In freeviewing, both images remain visible simultaneously, requiring you to train your eyes to focus on the correct image for each eye.
Two primary techniques exist for viewing these images – the first is known as Parallel viewing:
In parallel viewing, the left-eye image is positioned on the left, and the right-eye image is placed on the right. By directing your gaze into the screen with your eyes aligned parallel, you’ll experience double vision as each eye perceives the left and right images independently. At the correct viewing distance, the central images merge to form a 3D effect, while the outer images remain flat and two-dimensional.
The second technique is referred to as cross-viewing:
In cross-eye viewing, the left-eye image is positioned on the right, and the right-eye image is placed on the left. Focus your gaze at a point halfway to the screen, causing your eyes to cross at that midpoint. This allows the left eye to see the correct image on the right. As you cross your eyes, the image will appear doubled. When your eyes are crossed to the right degree, the central images will overlap and create a 3D effect, while the outer images stay flat and two-dimensional. [Source – visit this link for more tips on viewing these images.]
Now, let’s dive into the images! Click on each one to see it in full size, and don’t forget to share your thoughts in the comments section. A special shoutout to Denashi for proposing this list in the forums.
10. Fluorite

Photo by Terry Wilson
9. Mountains
Photo by Chip Stephan
8. English Cathedral
7. Lake Palanskoye
6. Countryside
Photo by Liceo Piovesan
5. Mount St Helens
4. Clouds
Photo by Terry Wilson
3. Lisbon, Portugal
Photo by Vasco Pires
2. Aerial View
Photo by Volkan Yuksel
1. Boston, USA
Photo by Wei O’Connell
All images are copyright (c) their respective owners
