I recently learned that there are two views: https://www.reddit.com/r/ParallelView/ vs https://www.reddit.com/r/CrossView/

And there is definitely a difference between them. If you try to view a cross view image using parallel view, it will look weird and not be easy to focus. Maybe the egg crate image was different?

Here's a quick test: https://i.redd.it/g5ilwgk99r781.jpg

Parallel view is easy for me but it takes a bit of effort for me to see cross view. For cross view, I start by looking cross-eyed at my nose and then try to see the image without fully uncrossing my eyes.