Other factors may be involved too, but to a lesser degree than heredity. Even if your vision is fairly sharp, headache, fatigue, squinting and eye discomfort or irritation may indicate a slight degree of astigmatism. A thorough eye examination, including tests of near vision, distant vision and vision clarity, can determine if astigmatism is present. It simply means that you have a variation or disturbance in the shape of your cornea. Astigmatism is one of a group of eye conditions known as refractive errors.
Refractive errors cause a disturbance in the way that light rays are focused within the eye.
Astigmatism often occurs with nearsightedness and farsightedness, conditions also resulting from refractive errors. Presbyopia Hold the book up close and the words appear blurred. Push the book farther away, and the words snap back into sharp focus. Eye fatigue or headaches when doing close work, such as sewing, knitting or painting, are also common symptoms. As we age, body tissues normally lose their elasticity.