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由超连续源诱导的角膜损伤值:进一步研究

Luguang Jiao1, Chao Wang1, Jiarui Wang1

  • 1Beijing Institute of Radiation Medicine, Beijing, People's Republic of China.

Lasers in surgery and medicine
|September 1, 2023
PubMed
概括

这项研究使用超连续 (SC) 激光器确定了较大的斑点大小的角膜损伤值. 这些发现表明,目前的激光安全标准对于某些红外波长可能是保守的.

科学领域:

  • 眼科医生 眼科 眼科
  • 激光物理 激光物理
  • 生物医学光学 生物医学光学

背景情况:

  • 角膜斑点大小显著影响激光诱导损伤值.
  • 之前的研究受限于低功率超连续 (SC) 源,将损伤值的确定限制在较小的点大小 (0.37毫米) 上.

研究的目的:

  • 通过使用高功率的SC源来确定大斑点大小 (1.2毫米) 的最低角膜损伤值.
  • 为改进激光安全标准提供数据.

主要方法:

  • 在新西兰白身上进行了实验,使用900-2000纳米的SC源.
  • 用裂纹灯生物显微镜评估角膜损伤.
  • 实际损害值是根据现行激光安全指南中的动作光谱计算的.

主要成果:

  • 角膜损伤值被确定为44.3 J/cm2 (辐射暴露峰值,0.14秒暴露).
  • 在值处的损伤涉及角膜上皮和表面层.
  • 在有效损伤值和最大允许暴露 (MPE) 之间发现了大约45的安全系数.

结论:

  • 目前的角膜MPE为700-1200nm可能过于保守.
关键词:
角膜损伤导致的角膜损伤安全标准的安全标准.一个超级连续的超级连续.这是一个门值.

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  • 需要进行进一步的研究,以确定特定于红外A波长的角膜损伤值.