In optics, Matthiessen's ratio is the ratio between the distance from the centre of the lens to the retina, versus the lens radius in fish and other aquatic animals. It was found to be constant at 2.55 in most fishes, while the value may decrease from as high as 3.6 to 2.3 in some fishes.
In optics, Matthiessen's ratio is the ratio between the distance from the centre of the lens to the retina, versus the lens radius in fish and other aquatic animals. It was found to be constant at 2.55 in most fishes, while the value may decrease from as high as 3.6 to 2.3 in some fishes.
Source: Wikipedia "Matthiessen's ratio" · CC BY-SA 4.0
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