The glaucoma test is really weird. The optometrist directs a puff of compressed air onto your eyeball through a special machine that measures the amount of resistance to the air blast. It feels really strange, and the natural impulse is to blink and pull back. There's no history of glaucoma in my family (well, none that I know of. No-one really lived long enough to develop something like this)but the test was done when I had my recent vision test.
Anyway, Glaucoma Awareness Week begins on Sunday. Then we can promptly forget about it for another year.