Today I had my eyes measured for IOL. One of the machines does two things, each it's own procedure. 1st, it reads curvature of the eye. 2nd, it provides a prescription for glasses/contacts.
When you look into the machine, you see a green field with a long straight road going into the distance. At the end of the road is a huge balloon, the kind you take a balloon ride in.
Every time I've had this exam with this machine, the machine somehow, automatically makes the balloon come into clear, sharp focus before the machine starts taking both 1st (eye curvature) and 2nd (diopter/prescription) measurements.
Today I went to a new eye doctor. When his technician used the "balloon machine", as I call it, the balloon didn't come into focus for either the 1st or 2nd measurement, as noted above.
At the start of the 1st test, I told the tech "the balloon's not in focus". She said the balloon won't come into focus for the eye curvature test. I thought that odd.
Same happened for the 2nd test. By that time I was preoccupied with other thoughts and didn't say "Hey! The darn balloon's not in focus!".
Am I correct to say the balloon needs to be focused to the patient's eye for accurate testing?