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Clinicopathologic study of the effect of radial tears and loop fixation on intraocular lens decentration
E I Assia1, U F Legler, C Merrill
1Department of Ophthalmology, Storm Eye Institute, Medical University of South Carolina, Charleston 29425.
Purpose:
The purpose of this study is to determine the effect of loop fixation and anterior capsular tears on intraocular lens (IOL) decentration.
Methods:
A retrospective measurement of IOL decentration was performed on 144 human eyes with posterior chamber (PC) IOLs obtained after death.
Results:
Decentration in eyes with asymmetrical bag-sulcus fixation (mean +/- standard deviation, 0.64 +/- 0.39 mm) was significantly higher than eyes with symmetrical fixation. In the presence of radial tears, symmetrically fixated IOLs in either the capsular bag or the ciliary sulcus decentered to a similar degree, 0.35 +/- 0.25 mm and 0.4 +/- 0.26 mm, respectively. The least decentration was observed with capsular fixation and no radial tears (0.18 +/- 0.09 mm). This was significantly less decentration than with any other form of fixation in the presence of radial tears.
Conclusion:
This study shows that capsular fixation with no radial tears, as can be achieved by using the continuous curvilinear capsulorhexis, is associated with the least decentration.