论文部分内容阅读
目的 :随着镜片材料和制作工艺的高速发展 ,更加安全地过夜配戴角膜接触镜已逐渐成为可能。方法 :对近年来涉及持续配戴高DK值角膜接触镜的一些研究论文进行综述。结果 :新型的高DK值的硅胶和硅氟化物水凝胶镜片与传统的HEMA镜片相比 ,氧传导性高出 6倍 ,这种新材料的镜片能够从根本上避免任何与组织缺氧有关的并发症。另一个明显的差异在于 :新一代的硅胶镜片有更高的系数。而且在生理反应、匹配以及易操作性方面 ,与传统的低DK值镜片也明显不同。另外 ,尽管与组织缺氧相关的并发症不再存在 ,但是由于镜片覆盖在角巩缘 36 0度范围 ,所以潜在的炎症反应以及机械性的损伤仍然不可避免。因此 ,制造者对涉及角膜生理反应的评估和对配适关系重要性的理解是这些新镜片获得成功过夜配戴的关键。结论 :作为眼保健的从业者 ,视光医师必须了解持续配戴镜片的新进展情况、新材料潜在的副反应和配适特性。
OBJECTIVE: With the rapid development of lens materials and manufacturing processes, it has become possible to wear contact lenses safely and safely overnight. Methods: This review summarizes a number of research papers dealing with the continuous wearing of high DK contact lenses in recent years. Results: The new high-DK silica gel and silicofluoride hydrogel lenses have 6 times more oxygen conductivity than traditional HEMA lenses, and the lenses of this new material virtually eliminate any hypoxia associated with tissue Complications. Another obvious difference is that a new generation of silica lenses have a higher coefficient. And in the physiological response, matching and ease of operation, and the traditional low-DK lenses are also significantly different. In addition, although the complications associated with hypoxia are no longer present, the potential inflammatory response and mechanical damage remain unavoidable due to the lens covering the 360 degrees of the limbus. Therefore, the manufacturer’s understanding of the importance of assessing and adapting the physiological responses involved in corneal physiology is key to the successful overnight wear of these new lenses. CONCLUSIONS: As eye care practitioners, optometrists must understand the new advances in continuous wear lenses, the potential side effects of new materials and their fit characteristics.