The Society of Motion Picture and Television Engineers (SMPTE), an organization that sets technical standards for the film and television industries, has established guidelines for the best distance to sit from a television based on its size. These guidelines are often referred to as the "30-degree rule," which suggests that the TV screen should take up at least 30 degrees of your field of vision. This equates to sitting about 1.6 times the diagonal size of the screen away. For example, with a 55-inch TV, the ideal distance is about seven feet four inches, while for a larger 75-inch screen, it should be around ten feet, and for an 85-inch TV, about 11 feet four inches. For a more immersive, cinematic experience, SMPTE also suggests the "40-degree rule," which means the TV should occupy 40 degrees of your vision. This corresponds to sitting about 1.2 times the diagonal size of the screen away. For a 65-inch TV, the 30-degree rule would suggest sitting about 8.7 feet away, while the 40-degree rule would place you around 6.5 feet from the screen. Even more immersive is the "62-degree rule," which would have you sitting just 4.6 feet from a 65-inch TV, creating a more theater-like experience. It’s important to note that these guidelines are not strict rules but rather recommendations that can vary based on the room's size, layout, and personal preferences. For instance, a writer mentioned sitting about 11.2 feet from a 77-inch OLED TV, not because of the guidelines, but due to the limitations of their furniture. Sitting too close to a TV, however, can lead to discomfort, including eye strain, dryness, fatigue, blurred vision, or headaches. In addition to comfort issues, sitting too close can make imperfections in the content or the TV more noticeable. For example, compressed video content, like that found on YouTube, may reveal more artifacts when viewed up close. Certain types of TVs, such as VA LCDs, can also show flaws like narrow viewing angles and backlight bleed, which are more apparent when viewed from a closer distance. Therefore, while the guidelines provide a helpful starting point, individual circumstances and comfort should also be considered.