I've had so much practice with the eyedropper I can deposit a single droplet of saline on my eye---single handed---while walking, driving (this is cause for some nervous seat-shifting in my passengers), paddling my canoe, riding the subway, and certainly in the middle of a pool match. In fact, my line of sight never leaves the horizontal plane...it's a fine balance of finger pressure and timing, lol.
What does happen when you use an added lubricant (saline, visine, whatever kind) is your body starts to produce less natural tears...and soon you find yourself needing eyedrops every couple of hours. My eyes were too dry to wear contacts w/o the aid of artificial moisture, and of all the products out there saline proves to be the most comfortable and safe...for me.
Remember, practice makes perfect
-Roger