Tablet PC 16: 9 is not a real golden ratio, but a slogan shouted by merchants to save costs. For the same 8-inch screen, 16: 9 saves 13% of materials compared with 4: 3, and 16: 10 saves 6%. Because the limit field of vision of human eyes is a rectangle similar to 16: 9, businesses are speculating on this concept. The aesthetic golden ratio is 1.6 18 or 0.6 18. Compared with 16: 9, in fact 16: 10 is the closest to the golden ratio.

The ratio of 16: 10 is the most comfortable for human eyes, because16:10 ≈15: 9, which is shorter than the visual field of 16: 9, does not use the limit of human eyes. On the contrary, 16: 9 is equivalent to squeezing the limit of eyes' attention, and watching the screen for a long time is very tiring.