Astigmatism is a part of your glasses prescription. It is a very common condition and is nothing to be feared! It simply means that instead of your eyes being shaped spherically like a soccer ball, they are shaped more like a rugby instead. When this occurs you need slightly more prescription in one portion of your eye than the other. Your eye doctor will be able to test and treat for this with either glasses, contacts or even refractive surgery (eg. LASIK).