What type of drops are they - tiacil or fucithalmic? Fucithalmic is much thicker and I find it harder to get in, especially as it's easier for the bun to blink straight out again afterwards.
If she knows anyone in the RWA there's an article in the Winter edition on how to give eye drops, that might help. I tend to pull the top lid up until it starts to curl out a little and put the drop under the lid. Or you can do the same and pull the bottom lid down and out a bit. Some buns are more cooperative than others though and it can be tricky if you have a bun that insists on trying to blink while you do it!