This is not about tea, but having had 3 retinal detachments, I wanted to tell you about them in case you ever have one and this information could save your sight.
If you suddenly have a medium or larger dark spot in your eye, coming from any side, top or bottom, call you ophthalmologist immediately. Don't wait. This is your retina detaching from the wall of your eye. You will need immediate surgery, or, at the very least, a gas bubble put in it to hold the retina in place. If you put it off, there is an excellent chance you will lose your vision.
Those of us who are good candidates for this to happen are generally older, are near sighted and have had cataract surgery. Otherwise, as my first surgeon said, it's just bad luck. Almost all of the procedures are pretty painless, due to all sorts of numbing things. Having your head down during the healing is not fun, but the rewards are great - eyesight. Plus, you eventually can get back to drinking new teas. And you can wear an eye patch and pretend you are a pirate. Aargh, maties!
Tea is also good for your eyes. A cold tea bag on your eyes, while resting for 15-30 minutes does wonders for brightening your eyes and spirits. It's even better for your innards, but we all know that, right? Of course, right.