OCR Text |
Show Penguin's Eyes Shift From Round to Square in Shape The king penguin would have a hard time getting fitted for glasses should he need them, for nis pupils pu-pils are round when fully dilated, hexagonal in shape when half dilated, di-lated, and square when completely complete-ly contracted. Cats' eyes shift in shape, too, from vertical in bright light to circular cir-cular in dim light. Although the tame house pet variety cat usually usu-ally has vertical-slit pupils, its wilder brethren such as lions sea with round pupils. |