My wife has ovarian cancer and has been treated with taxol and carboplatin along with avastin. She is 71 and has been in good health otherwise. Her eyes have changed color. Previous to chemo her Iris was a shade of green and now they are blue. In 40 year of practicing Optometry I ve never seen this occur. Do you have answer as to the cause of this? Thank You, Michael W. Medin, O.D.