DMSO is one of the most effective solvents known and makes the solution pass readily into the eyeball.
Yes, and absolutely everything else that it has been able to dissolve before it gets dropped into your eye also gets transported directly into your body.
As you rightly point out, it is a very effective solvent. Inside or outside of the lab it's dangerous stuff. I've always marveled at the "health nuts" who think DMSO must be good for you because it makes you smell like garlic.