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This column provides background science information for elementary teachers. This month’s issue discusses the science behind the human eye.
As usual Bill Roberton doesn’t fail to teach even an experienced educator new tricks and ways to teach about topics that students want to learn about. Using a few simple materials -- a 9 to 12 in. round white balloon, two 1–3 cm in diameter convex or plano-convex lenses, a small candle or other bright light source, and a black marker – the learner (students and/or teachers) can construct a pseudo-human eye to learn about how humans see. Following his simple procedures manipulating the balloon you can learn how we see things as well as model different eyes problems such as myopia and presbyopia.
Adah (San Antonio, TX)
I can't wait to build this simple model of the eye to use in my class. Especially useful will be using this model to explain why images on the retina (back of the balloon) are upside down and how the shape of the eyeball determines near and far sightedness.
$1.29 - Nonmembers