Otto Pötzl postulated a relationship between primitive, nascent, and undeveloped sense data with memories of the distant past. Clinical psychoanalytic evidence tends to verify this. In an illustrative case, one could trace many determinants of dream content containing visual elements of surprise as well as associations preoccupied with the past. These followed an ophthalmologic examination which included perimetry. The effects of the incompletely developed percepts of this examination, as well as his poor vision following this, were as stated above. Pötzl's statement is a particular example of a more general proposition: i.e., the more primitive the sense data developed by the perceptual apparatus, the more primitive and infantile are the memories brought to consciousness.