Why not take out a policy against not being able to practice your profession? Wouldn't they be in a bad spot if they lost their eyesight, but kept their dexterity?
I dunno. That's probably what it is - but I've more generally heard it expressed as "my hands are insured for [$x million]". One friend would say that as a pure status brag, and my uncle to explain why he wouldn't play basketball with the rest of the family.