From Quora "Each eye has 137 million rods and cones. If we assume 8 bits per pixel and 60 frames per second for 2.5 billion seconds, then the total information

From Quora "Each eye has 137 million rods and cones. If we assume 8 bits per pixel and 60 frames per second for 2.5 billion seconds, then the total information from both eyes is 3.3 x 10^20 bits, or about 40 exabytes (40 million terabytes). More realistically, the retina does not transmit pixels directly to the brain. Instead, it detects low level features such as center-surround contrast and movement. Each optic nerve contains about 1 million fibers. We can't see events lasting less than about 0.1 seconds, so let us assume an information rate of 10 bits per second per nerve fiber. This is a total of 10^6 fibers x 2 optic nerves x 10 bits per second x 2.5 x 10^9 seconds = 5 x 10^16 bits, or 6 petabytes. This represents a lossy compression ratio of 6600 to 1. The brain's visual cortex compresses this data further by detecting a hierarchy of increasingly complex shapes such as edges, lines, angles, characters, shapes, and objects such as faces. In a 1986 study in which people were asked to learn and recall thousands of pictures, Tom Landauer estimated that human long term memory is on the order of 10^9 bits, or 1 bit per second. If we assume that 40% of our long term memory is visual (in proportion to the size of the visual cortex), then it suggests that the retina and brain compress visual data at a rate of (3.3 x 10^20 / 4 x 10^8) = 825 billion to 1." https://qr.ae/pKofqQ https://qr.ae/pKofqQ