Why is the occurrence of eyelids in amphibians, Biology

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Why is the occurrence of eyelids in amphibians in comparison to their absence in fishes and adaptation to terrestrial life?

Eyelids associated to lacrimal glands protect and keep eyes lubricated against damage from the great luminosity of terrestrial environments. Fishes do not have eyelids as their eyes are in constant contact with the fluid medium.

 


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