中国组织工程研究 ›› 2013, Vol. 17 ›› Issue (34): 6215-6220.doi: 10.3969/j.issn.2095-4344.2013.34.023

• 生物材料学术探讨 biomaterial academic discussion • 上一篇    

人工晶体光学性能与Nd-YAG激光损伤的影响

刘 丽1,李爱军2,王 硕1,王 迎1   

  1. 1中国食品药品检定研究院医疗器械检验中心,北京市 100050;2北京大学第三医院眼科,北京大学眼科中心,视觉损伤与修复教育部重点实验室,北京市 100191
  • 出版日期:2013-08-20 发布日期:2013-08-20
  • 通讯作者: 李爱军,博士,主治医师,助理研究员,北京大学第三医院眼科,北京大学眼科中心,视觉损伤与修复教育部重点实验室,北京市 100191 laj100@sina.com
  • 作者简介:刘丽,女,1978年生,辽宁省抚顺市人,汉族,2004年首都医科大学毕业,硕士,助理研究员,主要从事眼科医疗器械研究。 liuli_7823@163.com
  • 基金资助:

    国家自然科学基金面上项目(81170877);国家重点基础研究发展计划资助(2011CB510200);中检院中青年发展研究基金资助(2012B9)。

Nd-YAG laser damage affects the optical properties of intraocular lens

Liu Li1, Li Ai-jun2, Wang Shuo1, Wang Ying1   

  1. 1Medical Device Testing Center, National Institute for Food and Drug Control, Beijing 100050, China; 2Key Laboratory of Vision Loss and Restoration of Ministry of Education, Eye Center of Peking University, Department of Ophthalmology of Peking University Third Hospital, Beijing 100191, China
  • Online:2013-08-20 Published:2013-08-20
  • Contact: Li Ai-jun, M.D., Attending physician, Assistant researcher, Key Laboratory of Vision Loss and Restoration of Ministry of Education, Eye Center of Peking University, Department of Ophthalmology of Peking University Third Hospital, Beijing 100191, China laj100@sina.com
  • About author:Liu Li, Master, Assistant researcher, Medical Device Testing Center, National Institute for Food and Drug Control, Beijing 100050, China liuli_7823@163.com
  • Supported by:

    General Project of National Natural Science Foundation of China, No. 81170877*; National Key Basic Research and Development Planning Project, No. 2011CB510200*; Youth Development Project of National Institute for Food and Drug Control, No. 2012B9*

摘要:

背景:临床上解决后发性白内障的主要方法是Nd-YAG激光后囊膜切开治疗,但治疗中损伤人工晶体的事件时有发生。

目的:以实验室测试为基础,研究Nd-YAG激光损伤对人工晶体光学性能的影响。

方法:以10枚疏水性丙烯酸酯人工晶体为试验样品,Nd-YAG激光单脉冲能量5.0 mJ,在每个试验样品后表面直径3 mm中心区域内进行50个单脉冲激光射击,激光射击后的试验样品在扫描电镜下观察其损伤形状,光学分析仪测试其平均光焦度和光焦度分布变化。

结果与结论:扫描电镜在放大40倍和1 000倍的条件下进行观察,人工晶体后表面出现近圆形凹陷,直径在50 μm左右,凹陷周边有一圈突起。人工晶体光学分析仪测试结果显示,激光损伤后人工晶体平均光焦度变化不大,但光焦度分布发生了明显变化,直径3 mm中心区域内光焦度分布出现以近圆形损伤凹陷为中心,向周围放射状的环状分布。Nd-YAG激光损伤对人工晶体平均光焦度影响很小,但对人工晶体光焦度分布有较大影响。

关键词: 生物材料, 生物材料学术探讨, 人工晶体, 晶体混浊, 后发性白内障, Nd-YAG激光, 光焦度, 成像质量, 晶体后囊切开, 晶体损伤, 光焦度分布, 国家自然科学基金

Abstract:

BACKGROUND: Posterior capsulotomy with Nd-YAG laser is the main method in clinic for the treatment of after-cataract, but it often damages the intraocular lens during the treatment.

OBJECTIVE: To research the effect of Nd-YAG laser damage on the intraocular lens optical properties based on the laboratory testing.

METHODS: Ten hydrophobic acrylic intraocular lenses were collected as the test samples, and then Nd-YAG laser with the pulse energy of 5.0 mJ was used for 50 single-pulse laser shooting on the center of a circle with the diameter of 3 mm on the back surface of each sample. The shapes of the damaged area on the samples were observed under scanning electron microscope after laser shooting. Optical analyzer was used to test the average optical power and optical power distribution.

RESUTLS AND CONCLUSION: The intraocular lenses were observed under scanning electron microscope under 40 times and 1 000 times enlargement and showed that there was circle-like depression with the diameter about 50 μm on the back surface of the intraocular lenses, and there was protruding around the depression. Intraocular lens optical analyzer test results showed that there was no significant change in the average optical power of intraocular lenses after laser damage, but the optical power distribution was changed significantly. In the center of the circle with the diameter of 3 mm, the optical power showed annular distribution radiating to the surrounding tissue with the center of circle-like depression area. The Nd-YAG laser damage has less effect on the optical power, but has great effect on the optical power distribution of intraocular lenses.

Key words: biomaterials, biomaterial academic discussion, intraocular lens, lens opacities, after-cataract, Nd-YAG laser, optical power, imaging quality, lens posterior capsulotomy, crystal damage, optical power distribution, National Natural Science Foundation of China

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