Dry eye syndrome is frequently experienced by women after menopause. In the past, this was assumed to be caused by falling levels of estrogen. Men also experience dry eyes, but about ten years later, on average, than women do.
Recent research has revealed that falling levels of androgen, the male hormone that is the primary culprit. Obviously, women start off with lower levels of androgen than men. After menopause, the levels decrease further. There is intensive research being carried on to incorporate androgen into topical eye drop to aid dry eye sufferers.