单片式和三片式聚甲基丙烯酸甲酯人工晶状体的偏心和倾斜比较。
Comparison of decentration and tilt between one piece and three piece polymethyl methacrylate intraocular lenses.
作者信息
Hayashi K, Hayashi H, Nakao F, Hayashi F
机构信息
Hayashi Eye Hospital, Fukuoka, Japan.
出版信息
Br J Ophthalmol. 1998 Apr;82(4):419-22. doi: 10.1136/bjo.82.4.419.
BACKGROUND
The extent of the decentration and tilt was prospectively compared between one piece polymethyl methacrylate (PMMA) and three piece PMMA intraocular lenses (IOLs) which were implanted in the capsular bag after performing continuous curvilinear capsulorhexis.
METHODS
91 patients underwent a one piece PMMA IOL implantation in one eye as well as the implantation of the three piece PMMA IOL with polyvinylidene fluoride loops in the opposite eye. The length of the lens decentration and the angle of the tilt were quantitated using the anterior eye segment analysis system (EAS-1000) at 1 week as well as 1, 3, and 6 months postoperatively.
RESULTS
The mean length of the decentration in the one piece IOL was smaller than that in the three piece IOL at 1 week (p = 0.0092), 1 month (p = 0.0044), 3 months (p = 0.0069), and 6 months (p = 0.0010) postoperatively. However, no significant difference was found in the degree of the tilt between the two types of IOLs throughout the observation periods.
CONCLUSION
These results clarified that the one piece PMMA IOL with rigid PMMA haptics implanted in the capsular bag provides a better centration than the three piece PMMA IOL with flexible haptics, whereas the tilt was the same between the two types of IOLs.
背景
前瞻性比较了在连续环形撕囊后植入囊袋内的单片式聚甲基丙烯酸甲酯（PMMA）人工晶状体（IOL）和三片式PMMA人工晶状体的偏心和倾斜程度。
方法
91例患者一只眼植入单片式PMMA人工晶状体，另一只眼植入带有聚偏二氟乙烯襻的三片式PMMA人工晶状体。使用眼前节分析系统（EAS - 1000）在术后1周以及1、3和6个月时对晶状体偏心长度和倾斜角度进行定量分析。
结果
术后1周（p = 0.0092）、1个月（p = 0.0044）、3个月（p = 0.0069）和6个月（p = 0.0010）时，单片式人工晶状体的平均偏心长度小于三片式人工晶状体。然而，在整个观察期内，两种类型人工晶状体的倾斜程度没有显著差异。
结论
这些结果表明，植入囊袋内的带有刚性PMMA襻的单片式PMMA人工晶状体比带有柔性襻的三片式PMMA人工晶状体具有更好的中心定位，而两种类型人工晶状体的倾斜情况相同。
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