Thank you very much for your post, and welcome to our forum.
Firstly I would like to say that it is highly unlikely that you could have been infected with HIV that way. In the first place, the other person had to be positive, and statistically it is more likely that she is negative, rather than positive. You do not know her status. Secondly she would need to have a high viral load for the blood to be infectious. Thirdly you would need to ahve a considerable amount of blood going into your eye, no eye secreations, and an inflammed conjunctiva to facilitate transmission. As you can see, I believe that there are more chnaces for you to be struck by lightning, than for you to get infected with HIV this way.
It is an extremely rare form of HIV transmission and very few people (usually in the health profession) have been reported as having become infected that way, because it is very difficult. Theoretically it is possible, and it would normally happen through the blood vessels of the conjunctiva, especially in the presence of inflammation, i.e. conjuntivitis.
I do not believe that you need to worry about this incident at all whatsoever.
More information here on HIV transmission risks