Light scattering and light transmittance in intraocular lenses explanted because of optic opacification

Michelson, Jennifer; Werner, Liliana; Ollerton, Andrew; Leishman, Lisa; Bodnar, Zachary

doi:10.1016/j.jcrs.2012.03.038

Cited by 43 publications

(44 citation statements)

References 30 publications

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“…[13][14][15] In previous studies, we evaluated light scattering and light transmission in IOLs explanted because of clinically significant postoperative opacification. 16,17 Very high levels of light scattering and a potential for decrease in light transmittance were found. However, only back scattered light was measured with a Scheimpflug camera (dispersion of light reflected out of the eye that can be seen by an external observer).…”

mentioning

confidence: 99%

Effects of Intraocular Lens Opacification on Light Scatter, Stray Light, and Overall Optical Quality/Performance

Werner

Stover

Schwiegerling

et al. 2016

Invest. Ophthalmol. Vis. Sci.

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confidence: 99%

Effects of Intraocular Lens Opacification on Light Scatter, Stray Light, and Overall Optical Quality/Performance

Werner

Stover

Schwiegerling

et al. 2016

Invest. Ophthalmol. Vis. Sci.

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“…The results show that the absorbance peak in the ultraviolet range for pure PSF was at 268 nm, which represents the UV damage peak for the polymers [19][20][21], whilst the transmittance peak in the visible range for pure PSF was 712.5 nm. The transmittance peak indicates the real effectiveness for pure PSF [21]. The absorbance and transmittance peak values were adopted for all subsequent measurements on the blended samples under study, as well as the sample transparency.…”

Section: Characterizationmentioning

confidence: 96%

Polysulfone/Cellulose Acetate Butyrate Environmentally Friendly Blend to minimize the Impact of UV Radiation

Rm¹,

Za²,

Na³

et al. 2015

J Material Sci Eng

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An eco-friendly transparent blend for ultraviolet and visible light rays from polysulfone (PSF) and cellulose acetate butyrate (CAB) was prepared by melting and re-molding. Some optical, mechanical, thermal and morphological properties of the blend were studied by means of UV-Vis spectroscopy, dynamic mechanical analysis (DMA), thermogravimetric analysis (TGA), scanning electron microscope (SEM) and X-ray diffraction (XRD). The UV-Vis spectroscopy results showed that the blend became more transparent in the ultraviolet region with an increase in CAB concentration, especially at the damage threshold (268 nm). The preferable blend sample contained 0.2% w/w CAB in the PSF/CAB blend, signifying low ultraviolet light absorption while preserving the transparency of the blend. The results also demonstrated that the amount of 0.2% CAB in PSF increased the modulus and thermal stability while decreasing the value of the glass transition temperature.

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“…The absorbance of high photon energy within the UV region led to scission in the polymer chain. More precisely, chromophoric groups, which are capable of absorbing the UV energy involved in the photochemical degradation reactions that occur via free radical mechanisms, led to the formation of hydroperoxides and chain scission of the polymer (Charlesby and Thomas 1962;Abouelezz and Waters 1978;Michelson et al 2012). The transmittance peak for pure PMMA in the visible region was 798 nm.…”

Section: Characterisationmentioning

confidence: 99%

Miscible Transparent Polymethylmethacrylate/Cellulose Acetate Propionate Blend: Optical, Morphological, and Thermomechanical Properties

Raouf¹,

Wahab²,

Ibrahim³

et al. 2016

BioResources

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To obtain a high transmittance blend within ultraviolet and visible regions, various transparent samples of ascending percentages of polymethylmethacrylate (PMMA)/cellulose acetate propionate (CAP) were prepared by melt blending using a twin screw extruder. These blends were characterised by ultraviolet-visible spectroscopy, and the curves illustrated that the blending ratio of 10% CAP in PMMA meets the required purpose. The morphological, mechanical, and thermal properties for pure PMMA and the PMMA/CAP 10% blend were investigated using X-ray diffraction, scanning electron microscopy, dynamic mechanical analysis, and thermogravimetric analysis. The results showed that the PMMA/CAP 10% blend has an amorphous structure and low stiffness than pure PMMA. The miscible PMMA/CAP 10% blend exhibited mechanical stability below the glass transition temperature (Tg), with a slight increase in Tg value relative to that of pure PMMA. The study also demonstrated that the intermolecular interaction between blend elements has an effective influence on the physical properties of the blend.

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Light scattering and light transmittance in intraocular lenses explanted because of optic opacification

Abstract: No author has a financial or proprietary interest in any material or method mentioned.

Cited by 43 publications

References 30 publications

Effects of Intraocular Lens Opacification on Light Scatter, Stray Light, and Overall Optical Quality/Performance

Effects of Intraocular Lens Opacification on Light Scatter, Stray Light, and Overall Optical Quality/Performance

Polysulfone/Cellulose Acetate Butyrate Environmentally Friendly Blend to minimize the Impact of UV Radiation

Miscible Transparent Polymethylmethacrylate/Cellulose Acetate Propionate Blend: Optical, Morphological, and Thermomechanical Properties

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