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/ 翻译发送稿 / Gas Permeable ( rigid or hard ) Contact Lens Wear 硬性透氧隐形眼镜的佩戴

Gas Permeable ( rigid or hard ) Contact Lens Wear 硬性透氧隐形眼镜的佩戴

dreamstime_17462578_0_020世纪90年代,以硅胶为原料的软性镜片问世,自此,“透氧隐形眼镜”不再只指硬性类。但在我们的讨论中,还是指硬性透氧隐形眼镜。

20世纪60年代,第一代硬性隐形眼镜问世。这款镜片是以一种不透氧的有机玻璃(PMMA)为原料。它的出现标志着人们第一次开始接触除普通眼镜外其他的视力矫正产品。经过几年使用后,验光师发现了PMMA眼镜佩戴者的眼睛较普通眼镜佩戴者的眼睛发生的几个有趣现象。一些患者近视下降呈现缓慢趋势,有的甚至停止下降;有的患者在摘掉PMMA镜的一段时间,视力变得清晰;还有的患者说摘掉PMMA镜后的好几个小时内不用戴任何眼镜就可以看清楚。医生把这一切都归于PMMA镜比角膜屈光率低。镜片的屈光率低于角膜,在角膜上会施加一种温和的作用力,致使角膜暂时呈现一种较平的状态,而这一状态在镜片摘掉后一段时间里仍能保持不变。这或许就能解释为什么摘掉镜片后还看的比较清楚,但是为什么这种清晰的视力能持续一段时间仍然是个谜,直到最近,科学家和医生们开始怀疑周边折射在控制近视恶化方面起到了一定作用。20世纪70年代,透氧镜片出现,由于其健康性,逐渐取代了PMMA镜的位置。

有些研究称佩戴标准型透氧隐形眼镜与近视控制效果无关,有些研究则称有关,但是具体有什么关系却无法给予一个定论。这或许是因为研究无法标准化各种可变因素,不同的镜片屈光率,角膜厚度,延展性常数,隐形眼镜尺寸等所有个体差异都会影响研究结果。相关研究请参考网站上的“研究图书馆”。

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翻译发送稿

  • 儿童近视防控研究所
  • 儿童近视的治疗
  • 与医生会面
  • Causes of Myopia Increase 近视的成因及进行性近视的增长;科学证据
  • A Brief History of Orthokeratology 角膜矫正术的历史概要
  • Corneal Reshaping Through Orthokeratology 通过角膜矫正术矫形角膜
  • ORTHOKERATOLOGY 角膜矫正术
  • Common Reversible Challenges With Orthokeratology 使用角膜矫正术的普遍的,暂时的,可消退的挑战
  • Pharmacological Control of Myopia With Atropine 阿托品对近视的药物控制
  • Gas Permeable ( rigid or hard ) Contact Lens Wear 硬性透氧隐形眼镜的佩戴
  • Accommodative Vision Therapy 调节视觉疗法
  • Vision Undercorrection 视力矫正不足;配镜度数低于20/20的视力标准
  • Bifocal and Multifocal Eyeglass Wear 双焦及多焦点眼镜的佩戴
  • Myovision Lenses from Zeiss 德国蔡司公司的爱视美眼镜
  • Altering Peripheral Refraction 引起周边的散焦;改变周边的折射
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