@larry_laser: Astigmatism is when your eyes are curved differently in perpendicular directions, changing how they focus light in the different directions So you could have perfect vision horizontally but be nearsighted vertically! Watch to see how the glasses lenses used to correct for astigmatism do that with their asymmetric shape Optical engineer Cory Boone breaks down weird optics facts and how light is used to do amazing things in these short, educational videos Introduce a kid in your life to science and optics with the Larry Laser kids' books, available through Amazon and the publisher SPIE's website! #optics #optometry #Science #stem #vision

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