“As it turns out, however, the accuracy of many eidetic images is far from perfect. In fact, besides often being sketchy on some details, it is not unusual for eidetikers to alter visual details and even to invent some that were never in the original. This suggests that eidetic images are certainly not photographic in nature but instead are reconstructed from memory and can be influenced like other memories (both visual and nonvisual) by cognitive biases and expectations.”
http://www.scientificamerican.com/article/is-there-such-a-thing-as/
TOK Topics 