If you had asked, or even just had better luck, the clerk might have explained that there was a reason the glasses were on sale. Rose colored glasses were a common magical artifact, popping up all over the world with various enchantments that affected reality and perception, but these ones had a bit of a...glitch, although some might call it a logical design feature.
In general, in science as in magic, energy cannot be created or destroyed. These glasses take much the same view of "traits" in people. Where most rose colored glasses would see the flaws in people and change them into assets, these ones take a more egalitarian approach: they improve people's flaws by *erasing* their assets.
If someone wearing these glasses looked at a man who was insecure about his short stature and worked out constantly to compensate for it, they wouldn't just fix his insecurity — they would reverse it. They would change him into a seven foot tall beanpole with no muscle mass, or else make him naturally tall but lacking the discipline to work out or eat right. If someone wearing the glasses looked at a nerd with lots of intelligence but low self esteem, they would make him dumb but overconfident. The specific change is based on the wearer — whatever the person using the glasses wants to "fix" when they look at someone will be the flaw that is changed to an asset. The other, more negative change tends to mirror the intended one in ironic or karmic ways.
And you, walking home, excited to try out your bargain magic item, have no idea the chaos you're about to cause...