Located or occurring outside the bulb of a structure, particularly in anatomy referring to areas beyond the eyeball or a bulb-shaped organ.
From Latin 'extra' (outside) + 'bulbosus' (bulb-shaped, from 'bulbus'). The term combines the prefix denoting external location with the anatomical term for rounded structures. Modern usage developed in medical terminology.
Your eyeballs are literal bulbs, and when doctors say something is extrabulbar, they mean it's happening outside that sphere—kind of like describing something outside a lightbulb rather than inside it.
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