>>The conspirancy exists in your imagination only.
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>The standard rebuke of the illuminancy :)
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Hard to get what you mean. I found

illuminance.
The apparent brightness of things seen by the eye follows the same laws as any other imaging system, because the apparent brightness is measured by the illuminance in the image that is projected on the retina. The angle U¢ in equation (8) inside the eye is determined by the size of the pupil of the eye, which varies from about one millimetre to about eight millimetres, depending…