Does contact lens have astigmatism?
Common refractive errors include astigmatism in addition to nearsightedness and farsightedness.Generally speaking, the formation of astigmatism and corneal radian, it and myopia are the biggest difference is, astigmatism cannot form a unified focus, so astigmatism patients are because there is double shadow and see not clearly.Contact lenses are currently recommended by many people for vision correction tools, so whether astigmatism patients can also choose to buy contact lenses?
In fact, astigmatism can also be worn with contact lenses, and if the degree of astigmatism is too small to affect the object, you can directly buy ordinary contact lenses to wear.Contact lenses provide a clearer, more open correction without distorting the field of vision, making them ideal for astigmatism patients.
However, if astigmatism is more than 75 degrees, then you need to make a pair of astigmatism contact lenses to correct.The preparation process of professional astigmatism contact lenses is roughly similar to that of ordinary lenses, which requires evaluation and inspection before the glasses are fitted, measurement of the exact degree, and then selection according to the specific degree.The difference is that astigmatism contact lenses are designed with a stable axis in order to keep the lens in the same position, so that myopia and astigmatism can be corrected simultaneously.
At present, do not exceed 1000 degrees of astigmatism can choose custom astigmatism contact lens, but should pay attention to do not arbitrarily convert astigmatism degree into myopia degree in the preparation of ordinary contact lens.It may not achieve clear correction effect but also aggravate the refractive error of the eye.
Whether using ordinary contact lenses or astigmatism contact lenses, wear and care should be in strict accordance with the instructions, and timely cleaning, regular replacement, also should be regularly to the hospital to review the fundus.