... paralleled to a camera, but is this allusion valid? Firstly, we know from research that the eyes do not see the complete picture of the world. One snapshot taken from the eye-camera would produce a picture like figure 2. The other shocking fact is that the objects in the external world do not really have colour at all. All coloured objects around us are so only because the eyes are highly sensitive to differences in wavelengths of light in the visible spectrum (of the electromagnetic spectrum). The third fact that we know about is that our brain does not interpret the world in photographic templates. Technically speaking, there is no "picture in the brain" that we can talk about. As Richard Gregory points out in "Eye and Brain", speaking of a picture in the brain would suggest an internal eye to visualise it, which will result in an infinite regression ...

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