4 different designs
These cards are used in optical retail shops to demo polarized sunglasses. A hidden image appears using the polarized sunglasses which is invisible to the naked eye or with regular sunglasses. The client is immediately convinced that the sunglasses are "special". The effect is truly spectacular and they are great for teachers to use in a class.
We have a limited supply of four designs in stock: fish, mountains, windsurf and fisherman. They are 114mmx76mm (4.5"x3"). They sell in pairs of two different designs (if ordering more than one pair we will make sure they are different).
If you need production quantities (1000+) of your own custom design, please inquire (use contact form on the right box).
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