Heartsword, Astigmatism circle lens are different from regular circle lens because the astigmatism ones are specially fit to the uneven curve of your eyeball. If you got a microscope and looked at the inside curve of any astigmatism lens and compare them with regular ones, the astigmatism lens will be thinner/thicker at different parts of the eye, like this:

Regular lens don't accomodate forthat. Both regular circle lenses and astigmatism circle lenses will give the black ring dolly effect, but the way they fit your eyeball will be different.
miss ambrosia x3, You should let them soak in lens solution before trying them on.
Anyways, here's a Jaejoong spam. I know some people asked around earlier about him wearing lenses, and I found some pics where yes, it does look like he is wearing circle lens. Here's a clear pic in very bright light of Jaejoong without any circle or colored lens:

In some screencaps from the DBSK Vacation Drama, Jaejoong is wearing some lens with only the black ring (No color tint). Bescon Tutti Ring, G&G Ifax black ring, ColorVue Natural, or Dueba DA-3 are all pretty similar and will give this effect.

<-- from "The Way U Are" Mini drama. Kiss scene caps.
There's been some threads on the Greenish/Turquoise/Grey lenses that he wears, and I dont think we can say the name of the lens brand for sure. Freshlook Turquoise/Grey as well as Tutti Grey has been suggested though. Here's some ref pics so you guys can speculate yourselves

<--Filming of 'O' MV. Greenish blue color.

<-- During 'O' release.

<--Closeup of above. Greenish/Turquoise tint.

<--looks grey.

<-- Step by Step-ish time. Can't really tell color; it's anybody's guess.

<--Almost looks like Tutti Green

<-- Fairly recent? Lovin' You release?