After Imagery is involuntary and helps in the perceptual process by prolonging the experience.
Almost everyone who has had a flash picture taken, has experienced the after image of the flash bulb. This after image may be intense, may last for seconds and will move as we shift our gaze.
Children generally have stronger after imagery than adults. The prolongation of the experience is thought to help the their perceptual processes by giving them more time to decode the input. The same will be true for Eidetic Imagery as we shall see.
For example, if they have to recall something like the row of patters shown below, they simply look at it and then when the patters are removed they still see the after image.
Adults, on the other hand, typically try to remember them verbally by name.