ArticleThe Analyst2026
Characterizing microscopic calcification deposits on acrylic intraocular lenses.
Article in The Analyst, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Authors and funding
11 authors.
Funding
Abstract
Intraocular lenses (IOLs) are implanted into the eyes during cataract surgery to improve vision. A rare complication following IOL implantation is the formation of crystallized deposits on the lenses, which significantly impair vision, necessitating subsequent surgical IOL exchange. Preventing these deposits from forming is critical, but this requires definitive molecular assignments of the crystals and knowledge of their mechanism of formation. Determining this information presents a significant analytical challenge due to the low numbers of crystals and curvature of the IOLs that limit use of conventional methods. Here, we report the development of multiple complementary analytical methods to characterize IOLs explanted from human patients and attain insight into the chemical identity and mechanism of the deposits. Initial elemental analyses using energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) revealed that IOL crystals contained calcium, phosphorus, and sodium and provided quantitative ratios between elements. Subsequent Raman spectroscopy identified carbonate in the crystals as well. An innovative single-crystal X-ray diffraction (XRD) method with integrated Rietveld analysis was then developed, which conclusively determined that IOL crystals were composed of substituted hydroxyapatite. Collectively, the data obtained from EDS, XPS, XRD, and Raman indicate that IOL deposits are composed of crystalline Ca
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