Yes, I realized that after I’d posted that tears weren’t actually needed.
However, if there are no tears, wouldn’t that suggest that cells can stretch and elongate without needing to increase their volume or create new cell material.
That there is some inherent property in them that means if you put a certain mechanical stress on them they automatically increase in size and stretch all by themselves.
Without needing to split and form new cells, as in mitosis and cytokinesis?
Stretch a fluid filled sack and density must go down as volume goes up, it seems plausible that a group of cells sensing such a change will cause increased cell division and cell proliferation.