Gorgon Eyes
From God of War Wiki
In the God of War series, Kratos can find Gorgon Eyes by looking in secret spots and opening hidden chests. For every six that he finds (every 5 in God of War: Chains of Olympus) his health meter is increased partially. After Kratos finds a total of 18 Gorgon Eyes (15 in God of War: Chains of Olympus), he won't be able to find anymore as his health meter will be fully reached.
