Context is important in determining what we see. The lines in the central circle are vertical.
They appear to tilt to the left because of the surrounding tilted lines in the outer circle.*
Can you see how the context of shelves crowded with template-labeled vials might have an impact on what you’re seeing in your pharmacy?
* Palmer SE. Vision Science: Photons to Phenomenology. Cambridge, Mass.: The MIT Press; 1999.
VIEW MORE ILLUSIONS: