The fly in the ointment was visual clutter in the visual system. In fact, many people don't understand their visual system and how it works. Most people believe that if they can see the world and objects clearly, it means their visual system is perfect. However, the fly in the ointment was the visual clutter of the visual system. What is visual clutter? Why is it important in our visual system? And how did it work? Can we avoid it? We can get the answer below.Visual CrowdingAccording to DM Levi (2007), visual crowding has been defined as the deleterious influence of nearby flankers on visual discrimination. This means that the visual object in our peripheral version is easier to recognize if it was shown in isolation, but difficult to identify when there are other objects surrounded nearby. (ECVP (2008) Thus, the reason for studying visual clutter is that it can increase our knowledge about object recognition processes, e.g. feature integration. (Levi, (2008) In In the past, many theories said that crowding was a multi-level problem with explanation. For example, a connection between neurons with almost matched characters causes crowding in the visual cortex, for example in V1. Past theories can provide adequate explanations for crowding, revealing the neural mechanism of singing is the most direct way to search for the neural locus of crowding (Bi, T. & Cai, P. & Zhou, TG. & Fang, F, 2008) In V1, there is no difference in adaptation to the effect among flanked and non-flanked conditions. However, in V2/V3, a stronger adaptation effect. in unflanked conditions than in flanked conditions was shown. (Bi, T. & Cai, P. & Zhou, TG. & Fang, F (2.... .. middle of paper ......ical pathway. In the dorsal pathway, it provides visual information that detect the movement of objects during the ventral pathway; it provides visual information about object recognition. The distinct properties of location (where) and shape (what) are estimates from regions of very different sizes (Majaj. , MJ & Palomares, M. & Pelli DG (2004) Conclusion Yes, there is nothing perfect in the world, including our visual system Not just the blind spot, but also the visual clutter. Clutter has been classified as a key fact as how people recognize objects visually (Pelli, DG (2008) however, this cannot be avoided nowadays. We can see that the human visual system is a very complicated system It still has a very long distance to discover all the details of our visual system. To this end, our psychologists and neurobiologists are fighting for their study...