Thankyou ladies. I couldnt see any hairs in her eye, plus she wasnt scratching or rubbing it at all.
She doesnt take any meds, the only thing she had differently yesterday was a few ZP squares, and i dont think theres anything in them she could have a reaction to.
I washed it out with saline, and she slept through the night as normal. It still looks quite red this morning, so have an appt with the Vet booked.
I do have Benadryl in my first aid box, but will leave off giving until we see the Vet, as i've only just read these comments! xx