Creature of Habit
After twenty years working in the same exam room.... You have your slit lamp just so. Your phoropter at the perfect height. All your pens and cover paddle at the perfect reaching distance to maximize efficiency.
Then you add ONE clear plexiglass sneeze guard on your phoropter and another on your slit lamp. And suddenly you are literally knocking off the guard and accidentally bashing into it five times a day.
I am a creature of habit.