Nd-YAG laser damage affects the optical properties of intraocular lens
10.3969/j.issn.2095-4344.2013.34.023
- VernacularTitle:人工晶体光学性能与Nd-YAG激光损伤的影响***
- Author:
Li LIU
;
Aijun LI
;
Shuo WANG
;
Ying WANG
- Publication Type:Journal Article
- Keywords:
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
- From:
Chinese Journal of Tissue Engineering Research
2013;(34):6215-6220
- CountryChina
- Language:Chinese
-
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 col ected 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 50μm 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.
