The world's oldest eye has been found in a 530 million year old fossil. <br /><br />The remains of an extinct sea creature include an early form of the eye seen in many modern day animals including crabs, bees and dragonflies, researchers believe. <br /><br />Scientists made the discovery while examining the well-preserved fossil of a hard-shelled species called a trilobite. <br /><br />The ancestors of spiders and crabs lived in coastal waters during the Palaeozoic era, between 541 and 251 million years ago.
