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Updated: August 17, 2026
Loeb attributes the blindness of cave fishes to a disturbance in the circulation and mutation of the eyes originally occurring as a mutation. But how could an explanation of this kind be applied to the case of Anableps tetrophthalmus, in which each eye is divided by a partition of the cornea and lens into an upper half adapted for vision in air and a lower half for vision in water?
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