It didn't look like a sqiggly, it looked like a seperation of the fibers, and they're knitting back together and closing the gap, much like broken bones mend...
I don't really see that referred to here...it wasn't really a "black marking"....anyway, it's a good sign:)


http://www.ehow.com/how_2033050_read-iridology-charts.html


Notice Iris Markings and Compare Them to Iridology Charts
Steps
1
Step One
Look for black markings. Black indicates dying tissue and is most common when the area indicated has scarring. Compare the markings seen on the iris to its location on the chart to learn where this scarring is likely to exist.
2
Step Two
Look for white markings, like small dots or lines. White indicates inflammation. It may mean that a particular area of the body is becoming overwhelmed. Consult the iridology chart to see which organ or system is experiencing this inflammation.
3
Step Three
Look for rings and arcs around the iris. These may indicate a number of things. Smaller contraction rings may indicate spasms of a particular organ. A sodium ring at the edge of the iris may indicate slow metabolism.
4
Step Four
Be aware of what sectors of the iris correspond to which areas of the body. Consult your chart. A basic chart is available at Irisdiagnosis.net (see Resources below).
5
Step Five
Commit the basics of the chart to memory. The brain section is represented at the top of the iris. The colon is further in, closer to the pupil. Problems with the lungs, heart and spleen are indicated on the right side of the iris. Problems with the nose, larynx, thyroid and spine can be found on the left side.
6
Step Six
Learn more about iridology examinations, the history of the practice and how to read iridology charts at the "Iridology Now" Web site (see Resources below).

THAT is what I was wondering, whether it was mirrored or not. Hopefully someone will know:)