| No, but any kind of visual disturbance is not a good sign, if it was me I'd be canning the dive I think. It's generally associated with migraine sufferers. Here's what a medical forum had to say about someone "seeing stars", I think diving counts as something physical enough to be considered "exercise", especially lugging a twinset around, which I believe you do for you cave stuff.
HTH
Steve
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"Flashing lights may occur if one exercises too hard as blood can be shunted away from certain parts of the brain and the eye to muscles. In this situation, one should try to stop exercising and see if the flashing lights stop.
It is difficult to provide more specific information without examining you. I think you should see either your ophthalmologist or primary care physician for further evaluation.
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