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United States Australia - New Zealand Brazil Canada China Europe - Middle East - Africa Hong Kong SAR India Japan Latin America Russian Federation South Korea Southeast Asia Taiwan English Blgarski Czech Dansk Deutsch Ellenika Espanol Estonsko Suomi Francais Hrvatski Magyar Italiano Ri Ben Yu k 'art 'uli hangugeo Lietuviu Latviesu Norsk Nederlands Polski Portugues Romana Pycckii Slovensky Slovenscina Srpski Svenska Turkce Ukrayinska Jian Ti Zhong Wen HomeConditions Refractive defects | En Espanol Most people with cataracts want not only clear vision after cataract surgery, but also freedom from glasses. One thing that can prevent this is residual astigmatism after surgery. Astigmatism is very common before and after cataract surgery. Nearly one in three people eligible for cataract surgery in the United States has astigmatism of at least 1.0 diopters (D), which is enough to cause significant blurring of vision without glasses or contact lenses. The US population has one astigmatism between 1.0 and 2.0 D, 6.5 percent has an astigmatism between 2.0 and 3.0 D, and 2.2 percent has at least 3.0 D. Intraocular lenses (IOLs) used in surgery cataracts failed to correct astigmatism. Some astigmatism could be corrected if the cataract surgeon made incisions in the cornea during cataract surgery, a procedure called limbal relaxation incisions (LRI). Unfortunately, the LRI procedure can only correct a limited amount of astigmatism, and sometimes the results are unpredictable. Fortunately, special intraocular lenses (called toric IOLs) have been developed that more predictably correct astigmatism during cataract surgery. How Toric IOLs Work Like toric soft contact lenses for the treatment of astigmatism, toric IOLs have different powers in different meridians of the lens to correct the asymmetric power of the eye inherent in astigmatism. Cataract surgery with a toric lens (IOL) implant is essentially the same as cataract surgery with a traditional IOL, with some important differences. Preoperative measurements are taken to allow cataract surgeons to select the best toric IOL performance and the necessary orientation of the implant in the eye to successfully correct astigmatism. Toric IOLs have special markings on the peripheral parts of the lens that allow the surgeon to see the orientation of the astigmatism-correcting lens. Once the toric IOL is implanted in the eye, the surgeon rotates the lens so that the astigmatism correction is properly aligned for the best results. Using a toric IOL during cataract surgery does not increase the risk of common complications of cataract surgery, but a misplaced toric IOL can cause blurred vision that cannot be easily corrected with glasses or contact lenses. Toric IOL brands include AcrySof IQ Toric IOL (Alcon) and TecUnited States Australia - New Zealand Brazil Canada China Europe - Middle East - Africa Hong Kong SAR India Japan Latin America Russian Federation South Korea Southeast Asia Taiwan English Blgar Cesky Dansk Deutsch Ellenika Espanol Estonia Suomi Francais Hrvatski Magyar Italiano Ri Ben Yu k' art 'uli hangugeo Lietuviu Latviesu Norsk Nederlands Polski Portugues Romana Pyckii Slovensky Slovenscina Srpski Svenska Turkce Ukrayinska Jian Ti Zhong Wen HomeConditions Refractive error | En Espanol Most people with cataracts want not only clear vision after cataract surgery, but also freedom from glasses. One thing that can prevent this is residual curvature after surgery. Astigmatism is very common before and after cataract surgery. Nearly one in three people who qualify for cataract surgery in the United States has astigmatism of at least 1.0 diopter (D), enough to cause noticeable blurred vision without glasses and contact lenses. A study of refractive errors found that 29 percent of the United States population had astigmatism between 1.0 and 2.0 D, 6.5 percent had astigmatism between 2.0 and 3.0 D, and 2.2 percent had at least 3.0 D. These results suggest that nearly four in 10 Americans have astigmatism. significant level of astigmatism. Intraocular lenses (IOLs) used in cataract surgery could not correct astigmatism. Some astigmatism could be corrected if the cataract surgeon decides to incise the cornea during cataract surgery, a procedure called limbal relaxation incisions (LRIs). Unfortunately, the LRI procedure can only correct a limited amount of astigmatism, and sometimes the results are unpredictable. Fortunately, special intraocular lenses (called toric IOLs) have been developed to correct astigmatism more predictably during cataract surgery. Astigmatism lenses, toric IOLs have different powers in different lens meridians to correct the asymmetric eye power characteristic of astigmatism. Cataract surgery with a toric lens (IOL) is essentially the same as cataract surgery with a traditional IOL, but with some important differences. Measurements are taken prior to surgery to allow cataract surgeons to select the most beneficial toric IOL power and the necessary implant orientation in the eye to successfully correct astigmatism. Toric IOLs have special markings around the perimeter. Parts of the lens that allow the surgeon to see the alignment of the astigmatism correction lens. After implanting a toric IOL in the eye, the surgeon rotates the lens to adjust the astigmatism correction accordingly for best results. The use of a toric IOL during cataract surgery does not increase the risk of the usual complications of cataract surgery, but improper pathology does. IOLs can cause blurred vision that is not easily corrected with glasses or contact lenses. Toric IOL brands include AcrySof IQ Toric IOL (Alcon) and Tec.

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