Architects can compose colors and draw representations of buildings. Architects can graphically design and build models. They can alter the visual surroundings. All these things depend upon the eye of the individual architect. Should he lose his sight, no longer will he be able to accomplish any of these things. Architecture is a visual art, and the student of architecture must have visual training. Let us clarify the following: What is vision? What is visual training? What is the purpose of this paper? Vision is the act of seeing. Visual training is an essential part of education to perceive the beautiful and to approach the creation of beauty and to arrange objects beautifully. Through our vision, we perceive images, dependent upon the relationship between an object and the eye. The purpose of this paper is to study this relationship: From the movement of the visual line (Chapter II) Fran the viewpoint of investigation (Chapter III) From the potential power of the object (Chapter IV) Accordingly, the author has developed three theories, one for each phase of the relationship as described above. These theories are limited to the analysis of an independent building within a described area.