The analysis of pathologies that affect learning processes over time has allowed the creation of different theories, which seek to explain dyslexia and its causes in the brain. The implementation of image processing techniques in this research field has made it possible to advance in the investigation of the different phenomena and anatomical structures involved in the learning processes. One of the techniques is tractography, which allows evaluating the connection of different areas of the brain and evaluating possible shortcomings or disconnections in different areas of the brain. The magnocellular theory suggests that the lack of connection of the cells of the magnocellular pathway in the LGN, which are part of the visual system of the human brain, are diminished in dyslexic patients, which would be a possible cause of cognitive functional deficiencies. This work seeks to evaluate the differences between a control and dyslexic subjects, by using MRI images.