I haven't noticed bloodshot eyes, @GorgyS - Have you been rubbing them much recently? There's been a lot of pollen in the air that could aggravate and it has also been very windy (in my area, anyway!).... Or do you live in a rural area where there may be aerial spraying of crops? Maybe ask your GP/Onc if others have complained of the same thing?
However, Since going onto AIs, my eyes have been very dry - sometimes as if a thin veil is over my eyes! Yet the ophthalmologist can't see it thru his microscope!! So I tend to blink a lot to keep them moist - and have some of those tiny little vials of saline that I use, if they get really bad.
take care - I hope it rectifies quickly xx