散光矫正型人工晶状体临床研究进展

Clinical research progress of toric intraocular lens

白内障手术前后的散光是影响术后视觉质量的重要因素。散光人工晶状体(Toric intraocularlenses,Toric IOL)是稳定和有效的矫正散光的方案。目前有约10种单焦点Toric IOL和4种多焦点Toric IOL。多数研究认为规则性角膜散光度数在0. 75D以上,并有远视力脱镜意愿的白内障患者可选择Toric IOL。多焦点Toric IOL存在远近分光的局限性,合并存在影响视力和视觉质量的眼疾患者不建议植入多焦点Toric IOL。精确的Toric IOL矫正需考虑个性化术源性散光、有效晶状体位置、IOL球镜度数、精确的角膜前后表面曲率测量等因素。术中需将Toric IOL的散光轴精确地对齐标记的散光轴。术后轴位旋转是其较常见的并发症。

Astigmatism is an important factor affecting visual quality after cataract surgery. Toric intraocular lenses ( Toric IOL) is the most stable and effective solution for astigmatism. Currently, 10 monofocal toric IOL models and 4 multifocal toric IOL models are available. The majority of studies agree on Toric implantation in patients with over 0. 75D of regular corneal astigmatism who want postoperative distance spectacle independence. Multifocal Toric IOLs which divide the available light between the distance and near focus ,are not recommended to cataract patients in presence of ocular comorbidities affecting visual acuity. The factors to take into account for Toric IOL correction include surgical induced astigmatism ( SIA), effective lens position ( ELP), IOL spherical powers and accurate measurement of anterior and posterior keratometry. It is important to match accurately the marks of the Toric IOL with the preoperative marking astigmatism axis during operation. Postoperative IOL rotation is a common complication.