Sheep Eyes (IMAGE) University of California - Berkeley Caption Grazing prey animals have horizontally elongated pupils that expand their field of vision. Their eyes rotate so that the pupils stay aligned with the ground regardless of whether their head is upright or pitched down. Credit Photo by Gordon Love, Durham University Usage Restrictions Editorial use only with credit. Commercial use prohibited. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.