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Capsular opacification associated with silicone implants
Journal of Cataract and Refractive Surgery
|July 1, 1989
Summary
This study found that sulcus-fixated silicone intraocular lenses led to more posterior capsule opacification compared to bag-fixated lenses. Bag-fixated silicone lenses showed the lowest incidence, suggesting fixation location is key.
Area of Science:
- Ophthalmology
- Biomaterials Science
Background:
- Posterior capsular opacification (PCO) is a common complication after cataract surgery.
- The choice of intraocular lens (IOL) material and fixation location may influence PCO development.
Purpose of the Study:
- To compare the incidence of significant posterior capsular opacification (PCO) within 12 months post-surgery.
- To evaluate the impact of IOL material (silicone vs. poly(methyl methacrylate)) and fixation (sulcus vs. bag) on PCO.
Main Methods:
- Prospective comparison of three IOL groups: sulcus-fixated silicone, bag-fixated poly(methyl methacrylate) (PMMA), and bag-fixated silicone.
- Standardized surgical technique performed by a single surgeon.
- Assessment of PCO incidence via capsulotomy rates at 12 months post-operatively.
Main Results:
- The incidence of capsulotomy was 16.5% for sulcus-fixated silicone lenses.
- Bag-fixated PMMA lenses had a capsulotomy incidence of 7.9%.
- Bag-fixated silicone lenses demonstrated the lowest capsulotomy incidence at 4.8%.
Conclusions:
- Sulcus-fixated silicone IOLs are associated with a higher rate of early PCO.
- The low PCO rate with bag-fixated silicone lenses suggests that fixation location, not silicone material itself, is the primary factor influencing PCO.
- Bag fixation of silicone IOLs appears to be a safe and effective strategy to minimize PCO.