The eye heals very fast. What type antibiotic drop is she on? Zymar? Vigamox? (The type will determine how severe the scratch is.) The eye can become scratched very easily--by a hair, dust, etc. I doubt it was anything you did relating to her bath.
If it is a scratch and not a corneal ulcer as SoCal mentioned, she should have a fairly quick...just a few days...recovery. Also, in (most) cases of an ulcer, you will be able to see it with with the naked eye. (SoCal, could you see the one your baby had?) Also, a small scratch will be less likely to cause permanent scarring, which I would guess is the 'dot' SoCal mentioned...BTW...most of the time they do show up blue, which seldom greatly affects the vision...it is when they are white scars that there is noticible damage.
SoCal-I do have some questions for you about your episode w/ the ulcer, if you don't mind. I mentioned before I was a Opth tech previously...I am just curious to the differences/similarities between people and dogs? Did you treat it with drops? What was the recovery time (I may have missed it.) Did your vet mentioned what would need to be done if it had not healed?