I agree with you. Let's face it, perception is largely subjective. We can measure and agree a wavelength, frequency and magnitude of something that we call li

I agree with you. Let's face it, perception is largely subjective. We can measure and agree a wavelength, frequency and magnitude of something that we call light with an instrument with a given specification. We perceive the world with a set of instruments which are not something you would design from scratch! However they are exquisitely refined for the job in hand. They are also bloody odd. Your eyes constantly wizz around (a sort of directed scanning) to paint a picture of what is going on around you - generally in front. Your fovea is hi res (that's what you see in focus) and the rest is a bit peripheral, so "fuzzy". The periphery is highly tuned to look for broad signs of threats and will go ping for any sort of movement. If the periphery goes ping then the fovea will be deployed to look for more detail. Now we get to rods and cones ... You also have rather more sensors - sound, and touch and more. The whole thing is a right old complicated mess - some bits work well and some don't.