"Some individuals with autism display extraordinary memory, including those with related conditions such as Asperger’s syndrome. Autistic savants are a rarity but they, in particular, show signs of spectacular memory. However, most individuals with a diagnosis of autism do not possess eidetic memory.

Synesthesia has also been credited as an enhancement of auditory memory, but only for information that triggers a synesthetic reaction. However, some synesthetes have been found to have a more acute than normal "perfect color" sense with which they are able to match color shades nearly perfectly after extended periods of time, without the accompanying synesthetic reaction.

Many people who generally have a good memory claim to have eidetic memory. However, there are distinct differences in the manner in which information is processed. People who have a generally capable memory often use mnemonic devices to retain information while those with eidetic memory remember very specific details, such as where a person was standing, what the person was wearing, etc. They may recall an event with great detail while those with a normal memory remember daily routines rather than specific details that may have interrupted a routine."

I think I have a photographic memory, when I’m anywhere I can remember the last time that I was in the location (in photographic detail) better than I can remember 10 minutes before the time. Has to do with memory priming I believe.

Matt

"Sergei Rachmaninov, one of Russia’s most famous composers and pianists, is said to have been able to perfectly recall any musical score after sight reading it just twice.

"Desi Arnaz, husband of Lucille Ball and co-star of I Love Lucy was able to memorize his script after reading it through once.