dioptrics

noun

1. 折射光学
   the scientific study of refraction (= the way light changes direction when it goes through glass, etc.)

1. Objectives To investigate the changes in ocular surface and dioptrics before and after pterygium surgery.
   目的前瞻性研究翼状胬肉患者术前、术后的眼表及屈光改变情况，为翼状胬肉临床治疗提供新的思路和理论依据。
2. Changes in Ocular Surface and Dioptrics before and after Pterygium Surgery
   翼状胬肉手术前后眼表及屈光改变的临床基础研究
3. The basic concepts of matrix method are introduced and three examples of dioptrics are given.
   文中论及了矩阵方法的基本概念，并通过三个实例计算，具体介绍了矩阵方法的应用。