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Impressum
Nd:YAG laser capsulotomy in eyes with a hydrogel, poly (methyl metacrylate) and silicone intraocular lens
Weinand F. S., Lazar M., Wagner R.
Zentrum für Augenheilkunde der Universität Gießen, Friedrichstr. 18, D- 35385 Gießen
Objective: To evaluate the effect of Nd:YAG laser capsulotomy
in hydrogel, poly (methyl metacrylate) (PMMA) and silicone intraocular
lenses (IOL).
Methods: This retrospective study comprised 95 patients (97 eyes)
who had neodymium:YAG (Nd:YAG) laser posterior capsulotomy (LPC) with
Zeiss Visulas laser from January to December 2000. All laser operations
were performed by one surgeon (R.W.) using the same technique. Impulse
rates and IOL pits were documented in each IOL material as well as the
interval between the cataract extraction and the LPC.
Results: Mean rate of IOL pits was 0.8 (mean impulse rate 40.3,
n=45) in the hydrogel group, respectively 1.6 (mean impulse rate 37.4,
n=20) in the PMMA group and 4.2 (mean impulse rate 42.4, n=32) in the
silicone group. The difference between groups was statistically significant
(p<0.01). Mean interval from cataract surgery to Nd:YAG laser capsulotomy
was 17.8 months in the hydrogel group respectively 53.2 months in the
PMMA group and 16.8 months in the silicone group. The difference between
groups was statistically significant (p<0.01).
Conclusion: The damage caused by the laser was more common and
severe in the silicone group. Therefore precautions should be taken to
prevent damage during Nd:YAG laser capsulotomy in eyes with silicone IOL.
In our study silicone and hydrogel IOL developed faster posterior capsule
opacification after cataract surgery than PMMA IOL.