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Lenticular Wink Keychain $4.00

The wink in this keychain is courtesy of sheet of tiny convex lenses.

Animation of winking keychange. If you hold the framed lenticular in your hand and look straight-on, you see the open eye. As you turn the lenticular image toward or away from yourself, the eye closes.

To create the image flip, two pictures are interlaced into one. The rows of lenses on the lenticular sheet focus on one image at a time at most angles. This appears as the winking keychain.

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