Astigmatism is one of the most common reasons for having a vision problem. Astigmatism can occur due to various reasons like cataract surgery or a patient with high myopia may experience it due to his/her age and genetics. This test may be required at times to check your astigmatism. It is important to note that it is not mandatory to have this eye test done and you are free to choose whether to do so or not. Astigmatism Test conducted by an optometrist or ophthalmologist can also help in diagnosing any other medical issues. Here things that you must know about how it works.