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Showing results 1 to 8 of 8
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Blind Spot
Source Institutions
In this activity, learners conduct a simple test to find their blind spot.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-731.jpg?itok=JGL3y5fp)
Seeing Your Retina
Source Institutions
In this quick optics activity, learners use a dim point of light (a disassembled Mini MagLite and dowel set-up) to cast a shadow of the blood supply in their retina onto the retina itself.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-513.jpg?itok=jeXuXg4C)
Experiencing Parallax With Your Thumb
Source Institutions
In this activity, learners investigate parallax, a method used to measure distances to stars and planets in the solar system.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-612.gif?itok=7y0IEX0t)
Afterimage
Source Institutions
In this activity about vision and optical illusions, learners conduct a simple test to demonstrate how our eyes create "afterimages." Learners stare at a black cardboard bat for at least 30 seconds an
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-324.png?itok=qn2n7CSP)
Magic Disc
Source Institutions
In this activity, learners create an optical illusion by spinning two attached cups. A round ball seems to magically appear when the cups spin.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-354.jpg?itok=JAKuUUay)
Depth Perception
Source Institutions
In this easy demonstration (3rd on the page), learners explore depth perception by conducting a test with two pencils.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-302.png?itok=t0WLcOKH)
Arrows
Source Institutions
In this activity, learners surprise their eyes with an optical illusion involving arrows made out of pipe cleaners.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-346.jpg?itok=m7HqL0WC)
Accommodating Accommodation
Source Institutions
In this demonstration (18th on the page), learners conduct a simple test to explore how the cornea refracts light, which is further bent by the eye lens through a process known as accommodation.