JOI's father delivers the garage monologue
in your eyes I see the appreciation of angle, a prescience re spin, the way you already adjust your overlarge and apparently clumsy child’s body in the chair so it’s at the line of best force against dish, spoon, lens-grinding appliance, a big book’s stiff bend.
Context
Mid-prediction of Jim's tennis greatness, the father inventories what he actually sees in the ten-year-old — and a lens-grinding appliance is sitting in the list as casual home furniture. The future optical scientist and filmmaker is already grinding his own lenses at ten; the father reads it all as tennis aptitude.