Relationship of optic materials with anterior and posterior capsule opacification as well as capculorhexis contraction of lenses

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Capsule opacification is a common complication following implantation of intraocular lenses for a long period. Scholars are looking for an ideal intraocular lens so as to reduce the incidence of capsule opacification.


To study the effects of three intraocular optic materials with sharp optic edge on anterior and posterior capsule opacification as well as capsulorrhexis contraction.


A randomized controlled study was performed at the Department of Ophthalmology, Affiliated Hospital of Chengde Medical College from May 2005 to December 2006.


A total of 135 patients (148 eyes) with age-related cataract, including 73 males (80 eyes) and 62 females (68 eyes) and aging 52-81 years with the mean age of (71.44 ±6.83) years, were collected in this study.


All patients were performed with phacoemulsification combining with implantation of foldable intraocular lenses which were characterized by sharp optic edges. Thereafter, they were randomly divided into three groups: lyophobic material group (n=43, 49 eyes), who were implanted with lyophobic acrylic acid intraocular lens; hydrophilic material group (n=42, 46 eyes), who were implanted with hydrophilic acrylic acid intraocular lens; lyophobic/hydrophilic material group (n=50, 53 eyes), who were implanted with lyophobic/hydrophilic acrylic acid intraocular lens.


Anterior and posterior capsule opacification as well as capculorhexis contraction were quantitatively evaluated 1 year postoperatively.


At one year postoperatively, incidences of posterior capsule opacification were 8.3% in the lyophobic material group, 26.7% in the hydrophilic material group, and 15.3% in the lyophobic/hydrophilic material group, respectively, and there was significant difference (P < 0.05); however, there were no significant differences in anterior capsule opacification and capculorhexis contraction among the three groups (P > 0.05).


The optic intraocular lens of sharp optic edge does not have any effects on anterior capsule opacification or capsulorrhexis contraction, but has effects on formation of posterior capsule opacification; in particular, lyophobic acrylic acid can reduce the incidence to posterior capsule opacification.

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