Innes A L
J Am Optom Assoc. 1982 Aug;53(8):635-40.
The basic concepts of impact resistance are reviewed. Also discussed are the research on materials, treatment and testing procedures, mechanisms of fracture and the factors affecting impact resistance. Research has shown that the strength of a lens treated or untreated is well below the theoretical strength of glass. The impact resistance of a lens is altered by the presence of breaks in the surface of a lens. The drop ball test as mandated by the FDA is essentially a control test. Its use as a means of evaluating the performance of a lens has been open to question. Researchers have suggested alternative forms of testing which may be more valid in assessing the impact resistance of an ophthalmic lens.
本文回顾了抗冲击性的基本概念。同时还讨论了材料、处理和测试程序、断裂机制以及影响抗冲击性的因素等方面的研究。研究表明，经过处理或未处理的镜片强度远低于玻璃的理论强度。镜片表面的破损会改变其抗冲击性。美国食品药品监督管理局（FDA）规定的落球试验本质上是一种对照试验。将其用作评估镜片性能的手段一直存在争议。研究人员提出了其他测试形式，这些形式在评估眼科镜片的抗冲击性方面可能更有效。
