ABSTRACT
The afterimage without a frame develops over time and loses and acquires its characteristics. While the unframed afterimage comes and goes, fades and then revives, and becomes of uncertain outline, the colour within the frame undergoes a slow but constant deterioration, which is hardly visible in the initial stages. Yet, at least in certain conditions, it is possible to find examples of afterimages in which the non-exposed parts of a partially hidden object are also represented and whose existence guarantees the integrity of the object. What can be said in all seriousness is that, after all, the afterimage is an image of what is effectively seen, perceived as existing, phenomenologically real, and not of what falls on the eye or what a photo-sensitive instrument could operationally verify.
