How the eyes work when reading, and how this is influenced by the parameters of the text we are reading, for example, line length and line spacing, was studied by scientists at the Institute of Cognitive Neuroscience of the Modern Academy of Humanities. Using a special video-oculographic system, while reading, the researchers recorded the coordinates of the subjects’ gaze, and then the parameters of eye movements were analyzed. The reading process requires rapid eye movements - saccades that quickly move the gaze from one piece of text to another. Only the central part of the retina, containing cones, has the ability to recognize symbolic objects. Therefore, while reading, you need to quickly move your eye in order to project the next fragment of text onto the central part of the retina. For recognition, you need to fix your gaze, and the eye remains motionless for 100-200 ms. Then - another saccade and the next fixation. The video-oculographic system determines gaze coordinates based on the analysis of reflected infrared light from various parts of the surface of the eyeball. The position of the darker pupil in infrared light coincides with the coordinates of the gaze. The results of the experiments indicate some regularities in the reading process. The reading speed increased slightly with line length; with one and a half line spacing it was greater than with single line spacing, and at the same time did not depend on font size. The number of characters that were read during one gaze fixation (the information capacity of fixations) also increased with line length. The capacity of fixations was greater when reading small text than when reading large text. The subjects fixed their gaze more often at the beginning (in the first third) of each line than at the end. The obtained patterns can be used to assess how well the text is perceived when fatigue sets in and attention decreases when performing a monotonous task. It will be possible to determine what the optimal properties of the text - line length and line spacing, for better perception. To maintain the desired level of attention, you can, for example, highlight informationally significant words or use other techniques. And this will be very useful when compiling educational text material.