I simply look up. 80% of the time it works every time.

I haven’t had to do this in a while, but here’s what worked for me. Don’t try to line it up by looking directly at the tip. While holding the dropper, place your palm against your face as an anchor, then look at your reflection in a bathroom mirror to visually align the tip with the pupil. Keep pressing against your face so your hand doesn’t move as you tilt your head back and squeeze.