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How does an underwater creature's eyes work underwater?

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The eyes of marine organisms are calibrated to low light conditions, and perhaps even phenomenon such as light bending. they have several adapatations in form of layers and such to protect their eyes. It is my understanding that light does not penetrate further than 200 meters or so underwater. While the ocean itself is over 1000 meters deep. read more

The eyes of fish and other sea creatures evolved to see underwater. Life first originated underwater but without eyes, so the first sea creatures had no vision at all but over time some evolved to have special proteins or chemicals that were sensitive to light. read more

Some mysteries remain, but there is no doubt that this creature’s eyes have evolved for use in an underwater habitat. Figure 3 – Refractive errors: Human versus penguin . Cormorants. Cormorants are both abundant and widespread geographically in temperate to sub-polar regions. read more

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