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在有关眼屈光配镜等方面的书籍中,常可以看到:“托力克镜片”一词在眼镜行业中也常用“白托”,“克托”等一些提法,认真追究说法不一。孙桂毓“论托克力表面及托力克镜片的光学理论和临床应用”一文提到:凡是具有托力克表面的镜片其他一面不论在前在后是凸是凹,统统称之为托力克镜片。在《眼科临床实践》一书中说:单纯的球柱面镜片不成弦月型的不能称为托力克。在《验光与配镜》一书中说:凡是前面凸后面凹的双曲面镜磨成球镜和柱镜者都可作托力克镜片。按第一种说法只有散光存在,具备了托力克表面就可以称为托力克镜片。而第二种提法是:只有散光
In the eye refractive glasses and other aspects of the book, you can often see: “To Lectra lens” in the optical industry is also commonly used in the “white care”, “Ketuo” and some other references, seriously pursue different opinions . Sun Guiyu “on the surface of the power and the Torreque Lectra lens optics theory and clinical application,” a paper mentions: all the lens with Toltec surface the other side regardless of before and after the convex is concave, all called Toltec lenses. In the “clinical practice of ophthalmology,” a book said: a simple spherical cylindrical lens can not be called Crescent Lectra. In the “Optometry and Optometry,” a book said: Any concave convex front hyperboloid mirror into spherical and cylinder lens can be used for Toltec lenses. According to the first argument, only astigmatism exists, with Toltec surface can be called Toltec lenses. The second formulation is: only astigmatism