So i took my cat to the vet?

generally speaking yopu would try to drop some of the ointment directly on the eyeball. This may require holding the lide open. This cabn be difficult. you can also try to puy a little in the corner of the eye and then try to open the lid so that it gets into the eye. It just takes practice. Try not to freak the cat in the process. Sometimes you need to wrap the cat in a towel so he can't scratch while doing this. Good luck.