Hi. I'm online and happy to answer your question today.
There should be no problem with having the liquid fertilizer mixed in with the water as long as it was a fairly dilute concentration. If it was more concentrated, say enough to lower the pH of the water, then you could have gotten a chemical burn that would require evaluation and treatment in the ER. In my experience mixed in fertilizer is not strong enough to normally cause a problem from this standpoint.
The force of the water, however, may have given you a corneal abrasion. This should heal within 24 hours without any problems. I suggest you place some bland ointment, such as lacrilube, in your eye, put an ice pack on it and then keep it closed.
If you think there could have been dirt or any other foreign body in the powerful stream of water it might be a good idea to go to the ER to make sure nothing is stuck in your cornea, or worse, has entered your eye. From what you have posted I do not think that is the case but since you are not currently at your computer I thought I'd mention this slight risk....
Does this make sense to you?
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