You should probably contact your chemo clinic right away for advice as eye whites yellowing usually indicates liver function problems.
Hallo
Last weekend I had yellowning of my eyes, I am on Doxil, no Carboplatin. I went to the doctor for liver enzymes check, and everything including billirubin was fine, like you describe it for your mother. My doctor asked me wether I was recently eating a lot of carrots. I was surprised, I didnt know, that that might color the white of the eyes. But indeed, I was drinking a lot of betacarotin containing commercial multifruit juice in addition to the juice from a pound of abricots and mango. I even have the impression that avoiding this for 2 days now improved the whiteness of my eyes. That may be a coincedence, but I thought, I will tell you that possible explanation by my doctor. Hope that your mothers eyes get well very rapidly and that the chemo otherwise is doing the wanted effect.