Do you think it will be like a compass bubble, coming and going or getting larger and smaller depending on temperature and elevation, or whether or not you left it sitting on the car dashboard in the sun?
While I ponder that, you can ponder how cool a way it is to keep your weight down, no diet or exercise required.
Because you can't read the scale? :-)
If the bubble were composed of helium it might have a lightening effect.
I'm just thinking of Phil's recent wish to drop a quick 10 pounds, but not quite willing to have his head chopped off. A couple of eyeball bubbles would would a least be a good start, even better if they were helium, and better still with hydrogen (which should be OK because he's a non-smoker). Plus, with two bubbles he should really get seasick, which might put a dent in his ice cream consumption.
I get seasick if I even look at someone on a swing, or think about being on a ship. So I would not do well with this eye bubble thing. I'd probably have to just wear a patch until it went away.