Open the eye, if you have another set of hands to help it's easier. Or wrap her in a towel like a burrito to help hold her wings, lay her on her back (they usually calm down) and then you can do it. Just squeeze a bit of the ointment onto the open eye, in the corner or at the edge of the lower lid, as it warms to her body temperature it will melt in and spread. Even if there is swelling and you can only get the eye open a little bit, you can usually get it in there. The terramycin has a much smaller tip on the tube, and it's easier to get in a small space. It's best to not let the tube or the medication touch anything else before it goes in the eye, but if necessary you can put a dab on a clean finger and try to get it in that way. Just make sure your hands are as clean as possible so you don't add any bacteria to the mix.