In optometry, if there is astigmatism, it will be required to provide the axis of astigmatism. Regardless of the type of astigmatism, the axial position can be accurately determined by the method of moving the light band. After knowing the axial position and the degree of the eyes, it is more convenient to wear glasses. Let's take a look at what the axial position means. Axial position refers to the horizontal position of the lens cylinder. If there is astigmatism, the axial position of astigmatism needs to be provided in the glasses, and the axial position needs to be used in the processing of astigmatic lenses in order to match a pair of suitable glasses. The axis of astigmatism is related to the curvature of the cornea. In the case of astigmatism, whether the line seen in a certain direction is clear or blurred is determined by the axis and degree of astigmatism. Generally speaking, the direction of blurred lines on the watch for astigmatism is the direction of the axis of the negative cylinder lens that the eye needs to wear. Axial position represents the direction of astigmatism, and accurate axial position is required when fitting glasses to ensure clear vision of the wearer. Therefore, it can be said that the more 'axial positions' provided by the astigmatism lens, the more comprehensive it is, and the better the effect of correcting astigmatism will be. If it is myopia, when wearing glasses, you need to take the lowest degree of the best visual acuity; hyperopia will be more complicated, in adjusting the esotropia and amblyopia, take the highest degree of good vision, and the best vision for hyperopia without complications And fixed degrees. It should be noted that when wearing glasses, it takes 10-15 minutes to wear the glasses with the adjusted degree, and feel for whether there will be abnormal sensations such as headache and dizziness, and whether the vision is tilted. When choosing a frame, it should be noted that the distance between the centers of the two lenses of the frame should be consistent with the measured pupillary distance, and the frame should not be too heavy.