3 cool things about polar bear eyes: 1 - polar bears have a nictitating membrane, or a third eyelid. This specialized and transparent eyelid protects the polar bears from snow blindness and allows them to see clearly underwater. 2 - polar bears have dichromatic colour vision. They see less vividly than humans, but ultimately have lengthened rods in their eyes providing for excellent night vision. 3 - polar bears have a smaller eye opening than other bears. Frequently subjected to whiteout snow c