Light scattering and light transmittance in a series of calcified single-piece hydrophilic acrylic intraocular lenses of the same design
| Autor: | Tiago Ribeiro, João Luiz Pacini Costa, Fabio Dornelles, Liliana Werner, Caleb Morris, Bruna V. Ventura, Daniel Barra |
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| Rok vydání: | 2014 |
| Předmět: |
Optics and Photonics
medicine.medical_specialty Materials science Light Scheimpflug principle Acrylic Resins Biocompatible Materials Prosthesis Design Light scattering Optics Ophthalmology Microscopy Transmittance medicine Humans Scattering Radiation Acrylic resin Device Removal Aged Aged 80 and over Lenses Intraocular Scattering business.industry Calcinosis Middle Aged Sensory Systems Prosthesis Failure Intraocular lenses visual_art visual_art.visual_art_medium Surgery business Hydrophobic and Hydrophilic Interactions Tomography Optical Coherence Visible spectrum |
| Zdroj: | Journal of Cataract and Refractive Surgery. 40:121-128 |
| ISSN: | 0886-3350 |
| DOI: | 10.1016/j.jcrs.2013.10.015 |
| Popis: | Purpose To evaluate light scattering and light transmittance of Ioflex hydrophilic acrylic intraocular lenses (IOLs) explanted because of clinically significant opacification secondary to calcification. Setting John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA. Design Experimental study. Methods Seven explanted and 8 control Ioflex IOLs were studied. Gross and light microscopy of all the IOLs were performed. Light scattering was measured with a Scheimpflug camera, and light transmittance was assessed with a spectrophotometer. Analyses were performed at room temperature in the hydrated state, and findings of the explanted and control IOLs were compared. Results Light scattering was 219.71 computer compatible tape (CCT) ± 2.62 (SD) for explanted IOLs and 4.75 ± 2.50 CCT for controls. The mean light transmittance in the visible light spectrum was 75.94% to 87.25% for explanted IOLs and 97.54% to 98.97% for controls. The most striking finding was variable degrees of light transmittance between 290 nm and 350 nm (ultraviolet-A and B radiation) in the explanted and control IOLs with expiration dates in 2009/2010 but 0% transmittance in this region in all controls with expiration dates in 2011/2012. Conclusions Light scattering was extremely high and transmittance was significantly reduced in calcified IOLs. Differences in transmittance observed in the 290 to 350 nm region between IOLs with different expiration dates were related to use of different hydrophilic acrylic raw material suppliers in the manufacture of the IOLs, highlighting the complexity of IOL calcification investigations. Financial Disclosure No author has a financial or proprietary interest in any material or method mentioned. |
| Databáze: | OpenAIRE |
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