Distribute the ping-pong ball halves, one per group. Remind students to be careful with the light bulbs as they may get hot. He or she then should completely cap one eye with the open end of the ball while shutting the other eye and covering it with a hand. The student should stay as steady as possible and not blink for up to 30 seconds and report any changes or observations to a recorder. Ask for ideas on why this happened.
People vary in their sensory perception.
Those who didn't experience the phenomenon should try again. Inuits, a people native to the Arctic region, accomplished that feat. About 2,000 years ago, they created wood goggles to cut glare from snow. Challenge students to make cardboard goggles that shade the eyes from glare but allow the wearer to see well. A girl survives alone in the Arctic without her family.