Wow, great website!
I have spent most of my adult life wondering if there was anyone else out there that was like me.
Thank you very much to the previous comment posters, you made my day!
I to grew up thinking every person had this ability.
It wasn't until I was a late teenager when someone asked me how I did pencil drawings and when I explained the reply I got was "That's an incredible talent to have!"

Anyway, I'm 46, male, a Professional Digital Graphic Artist.
In the 90's I heard the term synasthaesia for the first time and while I had many of the synasthaesia symptoms I always felt disappointed by the first hand synasthaesia stories I heard.
Synasthaesia seemed very basic, I just thought I had "synasthaesia-plus".

Here is my experience:
I can remember in detail, images from my childhood, how people looked, the visual distance of furniture in my parents house, etc, etc.
I can perceive any image from a single two-dimensional view and recreate it in three dimensions in my head.
These images are just as detailed as reality.
This is both internal and external.
For instance, once I see a persons face, I can create the unseen views and rotate the face from any angle.
Then I mentally project the image onto a blank sheet of paper and draw it (which is really a tracing).
I can do this with a high degree of accuracy. (Lately, somewhere around .005" - for sculpting physical objects)
These recorded images can also be "manipulated" as well, simply by pulling and moving certain areas of the image in my mind.
I can also "scratch-build" any mental image with any amount of detail.
When my eyes are shut it is if I am standing on a dark horizon that is covered horizontally 360º.
From this dark horizon the images emerge as though they are arising from a pool of liquid.
Other times simply flashing across this horizon at a very fast pace.

Like images I also collect sound memories and I am an Audiophile.
I can remember every instrument's sound, in detail, I've heard through my lifetime.
This is one area where sound and vision are connected. When I listen to music I see what I would call a "frequency" chart or graph.
This visual display stands about three feet from my face, sometimes it is red, other-times it is white against darker room lighting conditions.
This chart is very simple in shape, comprised of a single internal horizontal line.
It gives an accurate display of frequency response to the music and equipment that I am using.
It is fluid and moves with the music, it has no numbers to chart it, but if asked I'm able to report the frequency number.

As I've grown older my hearing has become more hypersensitive.
Also add the factor that one's hearing changes continuously from the moment you rise to the time you go back to sleep.
I am also very picky about audio equipment (trust me, this can be expensive) and VERY hypersensitive to fluctuating AC power quality from the Electric Co. and its effect on my audio equipment sound quality.

I am curious what experts on this subject thought the number of eidetikers exist.

Thanks again for your website!