
Since savants are born this way, it is very hard to understand how they develop and use their skills. Using more senses and getting more focus on specific senses probably enables utilization of more brain power to memorize images. Savants probably get the eidetic memory via strong focus and synesthesia. With practice, the accuracy of details becomes larger and exposure time becomes shorter, until we can get a very detailed account from split-second exposure. The person sits in dark room and sees short exposure of a scene of interest and then needs to describe the scene in great details. There is a way debated in literature of improving photographic memory via so-called “military method”. I personally had such and experience with one old illusionist, who looked at a picture for very little time and then described it in great details several minutes later. There are accounts of martial artists, savants and illusionists who can generate eidetic memory for long periods of time. This “photography” is probably stronger and lasts longer when there is a lot of adrenaline in our blood, so if you could mindfully generate adrenaline rush you could control the eidetic memory much better. Now we can access this photography several seconds or more after the initial exposure and gather details we want to use. What is eidetic memory? When we see something for a short while, it generates a sort of photographic image in our mind. There are blog posts here and here that share similar insights. What I can do is explain how each of us can enjoy small amount of eidetic memory which is available to each and every one of us. I am not going to separate between myth and reality: I do not know where the line lies.

Some say that eidetic memory does not really exist, while others claim to have eidetic memory.
