The article deals with the specific principles and specific features of perception of information in computer-oriented learning environment and peculiarities of the information assimilation, depending on the form of educational material presentation. We describe the psychological and physiological aspects of perception in the visualization of its submission. And as pointed out, process of perception of the information in computer-oriented learning environment is faster and easier. There is also outlined author's definition of the concept of computer-based learning environment, the system, which is an open education environment of the modern university.