The average axial length of the eye is:

The echoes of an A-scan that are being measured are identified by the instrument by means of:

Echographic spikes from an A-Scan:

One of the reasons immersion A-scan is more accurate than the contact method is:

Two very large parallel sheets a distance d apart have their centers directly opposite each other. The sheets carry equal but opposite uniform surface charge densities. A point charge that is placed near the middle of the sheets a distance d/2 from each of them feels an electrical force F due to the sheets. If this charge is now moved closer to one of the sheets so that it is a distance d/4 from that sheet, what force will the charge feel?  

From the anterior vena cava, blood flows to the _____.

Is the scan in this question an immersion or contact A scan?  How do you know?

When performing an A-Scan, which of the following statements is true about sources of measurement error?

You have performed an A-scan on your patient and obtained the following axial lengths for the OD: 23.36 23.42 23.65 23.45 23.55 Discuss whether you will keep all of the measurements or delete some.  If you will be deleting measurements, discuss which ones and why.

There are some pretty high total deviation numbers on the report below.  What do the numbers mean?  Enlarge your screen if needed. What do the completely black squares mean on the total deviation map?