摘要
配戴角膜接触镜后,角膜会发生一些生理变化,角膜知觉(敏感性)的改变就是其中之一。角膜敏感性的下降,致使角膜损伤或疾患的危险因素增加,得角膜感染性疾病的几率增加。镜片材料、类型(日戴或长戴)、日戴时间及戴镜历史的长短等因素与角膜敏感性的变化直接相关。短期配戴,无论软镜或硬镜,几乎对角膜的敏感性无不可逆转的影响。长期配戴PMMA镜片,角膜敏感性呈渐进性的下降,角膜知觉的恢复时间亦与配戴年数密切相关。长期配戴软镜角膜敏感性明显下降,但下降的程度不会随戴镜时间的延长而增加。长期配戴RGP镜片,角膜知觉明显减退,下降程度是否随配戴年份增加而明显改变尚待更充分的资料。RGP目前成为近视儿童验配角膜接触镜可选择镜片,RGP镜片对角膜敏感性的影响,及其儿童长期配戴后的角膜敏感性变化将成为研究热点。
Wearing contact lens will contribute to some physiological alteration of cornea, including variation of corneal sensitivity. Corneal disease is more likely to occure due to the decrease of corneal sensitivity. Corneal sensitivity loss is varied with lens material, daily wearing time, lens type, etc. Corneal sensitivity change results from short-term wear of contact lens may recover, while long-term wear of soft lens and PMMA lead to progressive reduction in corneal sensation.·
出处
《国际眼科杂志》
CAS
2004年第2期324-326,共3页
International Eye Science
