Remember that these "lenses" are very irregularly shaped, not at all like the smooth lens of a camera. A good real-world analogy is to look through a wine glas

Remember that these "lenses" are very irregularly shaped, not at all like the smooth lens of a camera. A good real-world analogy is to look through a wine glass, for example: https://laser.physics.sunysb.edu/_samantha/journal/ringpic.png https://laser.physics.sunysb.edu/_samantha/journal/ringpic.p...