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Physical processes involved when seeing, and comparisons between with other light detection systems. Includes questions about the eye, optical nerve, brain, corrective lenses, etc.

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Imagine a spring-loaded trap with a hole that's sized such that only a particular size of object can enter the hole and trigger the trap. The molecules involved in vision are like that trap, with a … reconstruct the original shape. Note that 'setting the trap' takes energy (derived from your metabolism and hence the food you eat), which is what allows the vision system to amplify the relatively small …
answered Aug 24 '15 by Dan Bryant