I am a person who has got the symptom of astigmatism, the mean of this eye disease is refer to the inconsistent of refractive power of the eyes in different longitudes, or the diopter range different in the same longitudes. From the ophthalmology, we can find it is a symptom which impaired eyesight resulting usually from irregular conformation of the cornea. It is also a defect in an optical system in which light rays from a single point fail to converge in a single focal point. The astigmatism is usually caused by the incorrect posture of watching. But watching TV for a long time will lead to the fatigue of eyes, it will get dry eye, tears, eye swollen, sore eye or blur vision symptom later if you are not pay attention to this situation of long time eyes use of watching TV. The screenshot are too dazzling to people, it hurt the visual purple to makes color cast and hurt the visual pigments and hurt ciliaris for a long time, then lead to myopia. You'd better take care of your eyes, binding the time of TV watching and make sure the TV in modest rays' condition.
