The eye drops bottle is not kidding when it says “Do not touch the tip of the bottle to your eye or any other surface.” Not even for a fraction of a second.
My frugal instincts led me to continue to use the (nearly full!) eye drops after they touched my eye and all it did was make the conjunctivitis worse. Because the bottle became contaminated in that less than a second in which it touched my eyeball, and I was just dripping germs back into my eye every day.
Throw it out.