My cat got scratched on the eye and won't open his eye.

About a week ago, my cat, Storm got scratched in the eye. At first we thought it wasn't serious beause he usually spends hours outside and (occasionally) gets into fights with other cats. But most of the time it's just a normal scratch wound and not in the eye. It was in the eye this time and after a day of checking on it, we realized that it was serious. So we took Storm to the vet the next day. The vet only gave him a few wipes on the eye area and prescribed him with an eye drop. The vet did not mention anything serious and told us to give Storm the eye drops 2 to 3 times a day until it heals and that's what i've been doing. But today, it has been a week and it doesn't look like Storm's eye is getting healed. In fact, he doesn't even open the eye. I'm scared that it might be something else. If anyone has any answers pls let me know.. 

I have no problem paying for treatment but if it's something i can do to help heal or make his eye get better from home, i'd like to know.  

Please and Thank you !!!

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