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M. Nagata, H. Matsushima, T. Senoo; Importance of Complete CCC (Continuous Curvilinear Capsulorhexis) for Centering of Single Peace Acrylic Intraocular Lenses. Invest. Ophthalmol. Vis. Sci. 2010;51(13):5735.
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© ARVO (1962-2015); The Authors (2016-present)
The centering of intraocular lens (IOL) is important factor for using aspheric and multifocal IOLs. In this study, affects of the position and shape of CCC (continuous curvilinear capsulorhexis) on dislocation of IOL were evaluated.
The study was conduct 70 eyes of 58 patients that had undergone cataract surgery. SN60WF (Alcon) was randomly implanted. The series comprised 44 eyes in which the edges of IOL optics were covered by the anterior capsule (complete cover, CC group) and 26 eyes in which the edges of IOL optics was incompletely covered (non complete cover, NCC group). The amounts of decentration of IOLs were analyzed and compared using EAS-1000 (NIDEK, JAPAN). In NCC group, the relationship between amounts of decentration and fixing position of haptics were analyzed.
The averages of decentraion were 0.18±0.09mm (CC) and 0.31±0.19mm (NCC) 6 months postoperatively. The decentraion in NCC group was significantly higher (unpaired-t test, P<.05) than CC group. The direction of IOLs decentrations were aim to the opposite direction from the non complete cover area. In NCC group, amount of dislocation was 0.23±0.06 mm, when there was IOL haptics on NCC area. However, it was 0.28±0.09 mm, when there was no haptics on NCC area.
Precise and certain CCC technique is important to obtain centering and stability of IOL fixation. The IOL was dislocated by adhesion of anterior capsule and posterior capsule postoperatively. Preventing adhesion using IOL haptics may be important for prevention of IOL dislocation. Position of haptics fixation is important for centering of IOL in NCC cases.
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