Precautions for choosing astigmatic contact lenses
There are not a few astigmatism in the myopic population, but most of the myopic patients ignore the correction of astigmatism. Therefore, compared with developed countries and regions, the awareness of astigmatism and the wearing ratio of astigmatism mirror in China are very low. Wear contact lenses, also need to pay attention to astigmatism, so choose astigmatism contact lenses need to pay attention to what matters?
Generally speaking, mild astigmatism often does not have too obvious symptoms. As long as the eyes are used accurately for a short time, no correction is needed. However, if the astigmatism degree is high and there is ghosting phenomenon in the near and far view, it must be corrected as soon as possible, otherwise it is easy to form amblyopia. When the astigmatism is more than 75 degrees, or the requirement for the clarity of the field of vision is higher, we suggest to customize the astigmatism contact lenses with astigmatism correction function.
Because the myopia degree and astigmatism degree should be taken into account, in order to ensure the accuracy of optometry, we must choose a professional organization or regular glasses shop for matching. Astigmatism is more suitable for correction of low degree, especially for people with high degree, full correction may cause the error of spatial positioning, or even leave a new refractive error.
Different from the correction of myopia and hyperopia, astigmatism involves the problem of axial position in addition to the degree. Because of the different direction of corneal deformation, the key to ensure clear vision is to ensure accurate and stable correction of axial position. Therefore, the stability of axial position is very important in the preparation of astigmatism contact lenses. The eye movement and eyelid blinking may make the lenses rotate, so that there is a deviation in focusing, and on the contrary, it will aggravate the fatigue of both eyes and affect the correction effect.
To buy astigmatic contact lenses, we must choose the regular channel products with guaranteed quality, and we must follow the doctor's advice to receive regular review.