9. Appendix: a few notions about the human senses

9.1 Vision

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9.1.1 Eye movements

In humans, for a good visual perception of the object that attracts our attention, light rays must be projected onto the fovea. Consequently, to explore space visually, appreciate the location of objects and navigate in space, we need to ensure that the movements of both eyes function properly, thanks to the oculomotor system. A number of eye movements are used to perform these tasks: movements to change the direction of gaze, and (con)vergence movements to modify the depth of the...