How to match contact lenses for astigmatism?
In life, patients with astigmatism are prone to dizziness, vertigo and torticollis, and their eyes are also prone to fatigue. Therefore, they all hope to wear a suitable pair of contact lenses, which is convenient and beautiful. So, how should astigmatism match contact lenses?
Generally speaking, if the degree of astigmatism is relatively small, at 75 degrees or below 100 degrees, you can try to wear ordinary contact lenses without considering the astigmatism. If they can meet the needs of daily life and achieve a clearer correction effect, they can be worn. Ordinary lenses. However, if the astigmatism is relatively large, or has significantly affected the vision, you must choose contact lenses with astigmatism design.
Common nearsightedness and farsightedness are uniform changes of the lens, but astigmatism is an uneven change, which causes the light to be unable to focus on one point. Therefore, the design focus of astigmatism contact lenses is to maintain the relative stability of the axial position, and to prevent the lens from rotating randomly in the eyes. In order to achieve this effect, customized astigmatism contact lenses adopt different design principles such as prism vertical weighting method, bilateral thinning method, and cutting edge method.
When astigmatism patients are fitted with astigmatism contact lenses, they should first undergo a professional optometry examination to assess whether they are suitable for wearing contact lenses, and then select lenses according to the degree and try them for a period of time to observe whether the lens is tight enough, whether the base curve matches, and the corrective effect Whether it meets the requirements, in addition, you should blink your eyes to check whether the axial position of the lens is stable, whether the rotation can be quickly restored, and how comfortable and oxygen the lens is, and so on.
Many people think that the condition of myopia and astigmatism is not suitable for wearing contact lenses, but in fact, astigmatism contact lenses can bring better vision correction effects. Therefore, if you want to try astigmatism contact lenses, you must go to a professional eye hospital or optician to check your glasses.