Firstly, find a place to sit or lie on your back with you head slightly backward. Secondly, gently separate your eyelids with your left thumb and index finger, keeping your eyes look up. Thirdly, use your right hand holding the eye drops and drip 1 to 2 drops into your eyes. Last, close your eyes for 1 to 2 minutes gently. You should also pay attention to the following points when you use eye drops: first, 1 to 2 drops are enough, avoid dripping excessively; use them under the doctor's guide; wash your hands before you use them. You should take good care of your eyes and timely seek medical advice if there is something wrong with your eyes.
I think this is related to experiences. If you practice more, you can put in eye drops without missing. Anyway, when you use eye drops, you shall your head that in the posture of looking the sky, and then put eye drops directly to your eyes and not blink your eyes at once. Just keep the posture a few seconds till the eye drops into your eyes.
Before you put eye drops in your eye, you should tilt your head back and use the index finger of one hand t o pull down the eyelid and use the other hand to hold the eye drops bottle. Then you can squeeze the bottle to put 1 drop in your eye. You should look slightly upwards without staring at the dropper when the eye drops comes to your eye. After the drop get into your eye, you can blink a few times.