I would suggest you start out using one to two drops of the tincture. Then add more drops as you get used to the eye drops.
I would put the drops into a cup of warm water to evaporate the alcohol in the tincture. Use enough water to fill the eye wash cup. I also found out that I my eyes could not tolerate the room temperature water, but the warm water did just fine.

Have a box of tissues next to you. Your sinuses will probably start to drain like you never seen before at first. The more I did this the less my nose would drain.
I would do this in the bathroom next to the sink with the lights turned off. Leave the door open for just enough light that you are not in complete darkness. The water in the eye cup would magnify the the light and I could not stand the extra brightness when I opened my eye.

Yes your eyes will probably turn red or at least bright pink, but that only lasted for about ten minutes.
When they cleared up the white of my eyes seemed a bite whiter.
I can't really say that this helped my vision, but it certainly did not hurt it either. My eyes seemed to feel refreshed after doing it, and it drained my sinuses. I built up a tolerance that I could use 10 to 15 drops. You will just have to experiment on yourself to see what happens. Good luck. I hope this helps.

after reducing eyebright i put it in a clear plastic container after about a week i see little black particles in the solution.does this mean it is contaminated? should i keep in a dark container?