Most of a year after cateract removal and lens implant,
my right eye needs:

                      -1.0  -1.75 @ 10 deg.

 A thin line at 100 deg. focuses sharply with its best
correction, but a thin line at 10 deg. is less sharp
with its best correction.  Corrected vision is good, but it is
difficult to measure the correct Rx because of the above.

 Note that the surgery required intact removal of the lens,
phaco not possible, and some stitching on top of the eye.
Stitches were never removed, though they may have dissolved.
The Rx the day after surgery was:

0   -4.0 @10 deg.

 Is this a known condition?  Clearly something more than
correctable astigmatism?

Thanks,

Jack