I am so sorry your baby is not feeling well.
If the eye was injured and the cornea was scratched, she needs to see a vet.She could lose sight and even the eye without special medication.
However,if it is just irritated, has a foreign object or conjunctivitis,
get Terramycin ointment. Some pet supplys and human drug stores carry it - but call first or http://www.revivalanimal.com/
In the meantime, apply a damp teabag three times a day.Try to flush with sterile saline for contact lens wearers available in drug stores.
She may also have a quarter of a chlortrimetin tablet every 12 hours also sold in drug stores OTC.
If you see any colored mucus (green, yellow) it mens the infection is bacterial and will respond to an antibiotic - I reccomend Clavamox for eye issues.
As long as she is eating this is only an emergency if there is a possibiity of an injury.
If she is sneezing (which an injury would not cause), it is most likely an upper respiratory infection and or conjunctivitis..
Most cats "act sick" by not eating - that is always a sure sign
Please let me know how your baby is feeling and if you still have questions.I will always be here for you
I hope she feels better very soon.
Sincerest best wishes,