Hoodia Discount Buy | Bonus Pharmacy +

visual centre. Any obstacle in the path of this, physiologically speaking, image conducting electric wire, will interfere with the normal perception of the retinal image. And finally the perceptive ap- paratus itself, as is obvious, must be in such a recep- tive condition, that it is capable of receiving and perceiving the image transmitted by the optic nerve. It is at this point that the psychic elementary proc- ess in the visual act takes place where a sensory stimulus carried through this circle of physical and phvsiological pathways becomes converted into a psychic process. For ordinary purposes in life for the function of vision alone, the visual apparatus could terminate at this juncture. But the complexity of our life demands more than this from our optical apparatus. It is essential that we not only see objects, but recognize them when we see them again. That necessitates another important element, namely a retention faculty or centre, where images perceived before are retained or stored for analysis and recog- nition. This image retention centre for form and color retains, in a latent state, images perceived which may later be either recognized or recalled as the occasion requires. The recognition of a previously perceived image depends upon a renewal of a sensory stimulation from an object that has a similarity to the object seen before. Recognition is a psychic process that depends upon renewal of a previous sensory stimu- lation. By this means we are able to identify ob- jects that at present set up the same excitation in the visual tract, that a similar object j^roduced some time ago. The recalling of an object in idea in a mental imasje does not depend upon a renewed sen- sorv stimulation, but comes through a psychic stimulation set into motion by the effort of the will. Here we do not have the object in physical form to stimulate the visual tract and the psychic path, but the thought of tlie object or the object in an idea, stimulates primarily the visual tract and then is transformed into a sensation. The cycle essential for visual perception is practically the same. N'o mental image can be produced purchase hoodia with any degree of exactness without first stimulating the visual ap- paratus, either by means of physical or psychic forces. The recalling ability of images into a state of consciousness must of course depend upon the previous perception primarily, and secondarily upon the power of retention, so that one psychic process is dependent upon another psychic process for its possible existence. RETENTION OF VISUAL PERCEPTS. The power to retain or conserve perceived images varies with different individuals. Some may re- tain images indefinitely, others for a considerable length of time, while some can retain them only for a short time after the object producing the physical sensation has been removed. There is a degree in the power of retention, just as there is a difference in the acuity of vision in different individuals. Retention is latent memory. It is a condition in which there is no active process. but it may, when necessity arises, be transformed into an active process. Thus, for instance, we saw a building somewhere at sometime years ago. We have never thought of this building and have never reproduced it in our consciousness in the form of a mental image. Yet this picture is retained in our cerebral cortex in a latent state. We may, how- ever, either by means of the effort of our will or because of some association of ideas, be confronted with a condition when the image of that building again stands in our consciousness as a visual image. The hoodia 57 latent visual energy has been converted into an active mental process. The process of retention of visual percepts depends upon the following prin- ciples : 1. Fixation. This is buy hoodia online a physical act in wliich the external ocular muscles are so directed as to fix the object at the same time it produces a clearer image. Central vision will be retained longer than peripheral vision. Images perceived from peripheral impres- sions fade away, even if recognized as soon as the stimulating objects are removed. We also know that it is possible to look vacantly into space with- out actually perceiving any definie object, or if per- hoodia buy ceived it is only temporarily. There is a lack of fixation which interferes with our power of reten- tion. order hoodia Fixation is essential to perception as well as retention. 2. Duration of fixation. The cheap hoodia time spent in the process of perception greatly influences our power of retention. The longer the time of fixation, the better the power of retention. The longer the ob- ject is exposed to our optical apparatus ; the longer we look at an object ; the longer the primary per- ception, the better, and the more probable the reten- tion. A momentary perception will quickly fade away and the image may be recalled with difficultv or not at all a hoodia p 57 few hours after it has been perceived. On the other purchase hoodia online hand, when an object has been ob- May 29, 1 915] BRAF: VISION. III3 served for a considerable time, the prolonged period of exposure during the primary act of perception produces an impression which may be retained for a long time. 3. l^Vequency of observation. The power of re- taining visual percepts is greatly augmented by the

Related tags: