If a child is tested for myopia and astigmatism, this is the time for parents to be vigilant! The human eye is not perfect. If the cornea is curved at one angle and flattened at others, light will not focus accurately on the retina, a condition called astigmatism. People with astigmatism have a harder time seeing things in fine detail. Usually, astigmatism does not occur alone, and the patient’s eyes are usually nearsighted or farsighted. Astigmatism can be corrected by wearing glasses that are specially curved at a certain angle to correct the astigmatism of the patient’s eye at that angle; contact lenses or laser surgery can also correct the problem. In addition to the cornea, the curvature of the lens varies and is another cause of astigmatism. Astigmatism is caused by the eye’s ability to bend light differently in different directions. Nearsighted farsighted or normal eyes have a refractive situation like a soccer basketball, while astigmatic eyes bend light like a rugby ball, with some directions bending more and others less, so imaging cannot be a point. You may also find that some directions are easier to identify and some directions are harder to identify when you look at your vision chart. Vision at distance and near can be affected, and in severe cases there can be double vision. Astigmatism is usually natural. If your astigmatism is high and you did not have glasses as a child, you will see things more blurred from childhood to adulthood, but since you do not compare yourself, it is harder to notice than nearsightedness and farsightedness. And people are born with poorer vision to get full development and rely on the refractive system to project a clear image to the retina to stimulate fundus development. People with high astigmatism have blurred vision both near and far, and the fundus is not adequately stimulated, resulting in underdevelopment and amblyopia.