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Dark Adaptation
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In this activity (6th on the page), learners investigate how photoreceptors in the eye (rods and cones) "adapt" to low light conditions.
The Blind Spot
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In this activity (1st on the page), learners find their blind spot--the area on the retina without receptors that respond to light.
Your Blind Spot
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In this activity, learners will explore how their own eyes work by experimenting with their photoreceptors.