Like these little beauties...
Eye Charts combine some of the elements that always excite me. Interesting typography, an unusual light fitting, and an aesthetically pleasing object, all wrapped up in one little box. Who could ask for anything more?
This one came from Castle Gibson, and is apparently from Germany, circa 1920. It's a particular favorite as it has a sort of soulful, poetic glow.
On a more modernist tip, we have this one:
I'm guessing that it's British, and from the Sixties. It can be lit up in sections, and the 'OXO' wheel spins. Fun!
Myopia has never seemed so stylish.