how to read an OPD printout?

(Diligently did I search the web on this before posting.)

Ack.
I'm trying to find out the spherical aberration of my right cornea.
The info will help to choose an IOL for my right eye.

This was measured for both eyes, and I have the printouts, but I don't
seem to be able to find this number on them.

Is anyone familiar with these?

The printout contains 6 pictures, stacked 2 across and 3 deep.
They are labelled things like "Axial Right", and "Wavefront HO
Right". In the corner/s of each picture are lots of numbers.
Across the bottom of the page is a single line, with more numbers,
for:
SPH, CYL, AXIS, SimK1, SimK2, dK, e(Q), SA@6.0, Pupil.

The machine was a Nidek OPD Scan II.

The numbers under "SA@6.0" say:
(on printout for left eye)
O+1.875 C+0.151

(on printout for right eye)
O+1.224 C-0.771

At first, I thought that the "C" number must be the corneal spherical
aberration. And +0.15 (left eye) seems like a plausible number for
that.

But -0.77 seems like a really, really odd number to me.
I question it.
Maybe this number is *not* corneal spherical aberration, but something
else.
Maybe I'm looking in the wrong place on the printout, and the SA is
elsewhere (perhaps in that "Q"?).
Maybe the scan was in error.

If you know what to look for, that would be very helpful.

thanks,
Liz in Indy
(And a very deep *thank you* to all the pros on the list who have
answered my questions so far.)