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Background and Purpose With the development of modern social science, people's lives and learning conditions and lifestyle change, so that the incidence of refractive errors has been increasing. Refractive errors are the most common eye disease worldwide. The incidence of refractive errors and human factors such as race, gender, age, region, environment. Asia is recognized refractive error prone areas, which China and Japan, the highest incidence. While challenging fields for refractive error correction and treatment has been in continuous development. Since the mid-20th century, the refractive intraocular lens surgery (refractive intraocular lens surgery) continue to improve, and gradually used clinically. The meaning of the refractive intraocular lens surgery, intraocular lens implantation, and correction of abnormal refractive state of the eye. It makes the emergence of different ages, different refractive status underwent individualized treatment programs as possible. Astigmatism intraocular lens (toric intraocular lens, Toric IOL) concept in 1992 first put forward by Misawa, attach a cylinder that artificial optical crystal sphere. First generation Toric IOL rotation poor stability and large incision itself can produce astigmatism correction of poor results, not promoted clinical. Posterior chamber phakic astigmatism type the IOL (visian toric implantable collamer lens TICL) implantation as a new method for surgical correction of astigmatism, it does not change the original refractive interstitial, more in line with the eye physiology, refractive correction of a wide range of postoperative visual symptoms, reversible and other advantages. The main topic by line TICL implantation in patients with myopic astigmatism, the accuracy of the evaluation of postoperative correction effect, predictability, stability and security of the operation and the possible risks and complications, thus revealing its clinical application prospects. The continuous line TICL implantation collected from April 2007 to June 2009 in the First Affiliated Hospital of Anhui Medical University, Shenzhen Pok Oi Hospital and the complete clinical data of 57 cases of myopia with astigmatism of 100 eyes. Preoperative myopia (-4.75 ~ -23.00) D, the average (-11.225 ± 3.920) D, astigmatism (1.25 to 6.5) D, the average (2.605 ± 0.923) D, the average axial length (27.527 ± 1.653) mm, anterior chamber depth average (3.270 ± 0.306) mm. Postoperative follow-up time of 1 day, 1 week after surgery, in January, March, June, December, and 24 months, 2 years. MAIN OUTCOME visual acuity, refractive status, corneal endothelial cell count, corneal curvature, IOP, anterior chamber IOL cylinder axial and their own crystals and other patients before and after. The observed results were statistically analyzed to reveal the the TICL surgical efficacy and risk. 1, and 6 months postoperatively, patients with residual astigmatism (0 ~ 2.5) D, the average (0.778 ± 0.674) D correction effect accurately significantly. 2, more than two years of follow-up time of 35, after June, December, 24 months astigmatism changes in 0.5D, stable correction effect. Predictability 3,95% uncorrected visual acuity (uncorrected visual acuity, UCVA) and 99% of eyes best corrected visual acuity (best corrected visual acuity, BCVA) at or better than the preoperative BCVA, corrective effect. 4, after 3 months, observed TICL rotation within the eye, wherein the rotation is greater than 30 ° eye 2%, 96% of eyes, the rotation is less than 15 °, TICL stable within the eye. Complications: 7 intraocular pressure transient elevated intraocular pressure-lowering treatment, returned to normal in 1 week. The cases of two persistently elevated intraocular pressure. One cases eyes glare. No lens opacity, pigmentary glaucoma cases. Conclusion TICL can improve the patient's visual quality, accurate correction of astigmatism effect, predictability, and has a good rotational stability. The application of this new method opens up new therapeutic prospects for refractive surgery.
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