Solution of a problem would depend to a great extent on the way we view or observe the problem and understand it.
For example, glucoma was defined as a ‘pressure build up’ behind the eye ball. So all treatments were geared towards relieving this pressure through cuts to allow the fluids that build up behind the eye to drain. But it did not yield great or desired results.
Only later it was understood that glucoma is a result of eating away of the optic nerve. Hence, two conditions were necessary to precipitate the problem — Pressure + Optic nerve
With the change of view and understanding glucoman could be treated in a better way with more success.