Having dirty eyeglasses is maddening. You find yourself trying to look through smudges at your computer screen, or wiping off a fallen eyelash only to add another fingerprint to the lens, not to mention the unbelievable number of pet hairs and nose smudges dogs and cats leave behind. Why do animals find glasses so fascinating?
In desperation, you probably pick up the hem of your shirt or a paper towel to wipe them clean — only to find you've somehow made them worse. That smudge in the center of the lens now spreads from one edge of the frame to the other and if you're lucky, there's a constellation of scratches right in front of your eyeball too.