Influence of blue light spectrum filter on short-wavelength and standard automated perimetries

Castro, L. C.; Souza, Carlos Eduardo Barbosa de; Soriano, Eduardo; Melo, Luiz Alberto S.; Paranhos, Augusto

doi:10.1590/s0004-27492006000500020

Cited by 11 publications

(13 citation statements)

References 14 publications

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“…[1][2][3] Since neonatal age, the natural human crystalline filters efficiently the hazardous ultraviolet (UV) light and partly the blue light. [1][2][3] Since neonatal age, the natural human crystalline filters efficiently the hazardous ultraviolet (UV) light and partly the blue light.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a class of polyurethane materials for intraocular lens manufacturing

et al. 2014

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Ophthalmic lenses are medical devices with considerable requirements in terms of optical, biomechanical and biological performance. There is limited number of materials used for their manufacturing, comprising mainly silicones and poly(meth)acrylates. This series of publications aims at investigating the applicability of thermoplastic polyurethane elastomers (TPU) for the manufacturing of ophthalmic lenses and examining the properties of the respective devices. This study is related to the synthesis of TPUs with chemical compositions that comprise chemically grafted filters for the hazardous-light. GC-MS, attenuated total reflectance Fourier transform infrared spectroscopy, and UV-vis spectroscopies confirmed the reaction completion and the beneficial effect of the filters on the light transmittance, respectively. Relatively high refractive index of the material was measured and allows for the manufacturing of thinner lenses. The contrast sensitivity determined for a model intraocular lens (IOL) was satisfactory. Few optical defects were, however, present on the model lens prepared by thermoplastic injection molding. The elasticity of the materials was evaluated in view to their potential applicability as foldable IOLs by determining their glass transition temperature and their Young modulus and measuring their shore A. The TPU materials demonstrated more bioadhesive character compared with a benchmark hydrophilic acrylic reference material, which is already used for IOL manufacturing.

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Section: Introductionmentioning

confidence: 99%

Evaluation of a class of polyurethane materials for intraocular lens manufacturing

et al. 2014

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“…Castro et al ,12 reported a reduction of MD and FT on SWAP testing, but not with SAP testing when a blue-light-spectrum filter was placed in front of the eyes of 20 young patients without cataracts. These filters mimicked the Acrysof Natural IOL with regard to light spectrum transmittance.…”

Section: Discussionmentioning

confidence: 98%

Effect of yellow-tinted intraocular lens on standard automated perimetry and short wavelength automated perimetry in patients with glaucoma

Nilforushan

Parsamanesh

et al. 2014

Middle East Afr J Ophthalmol

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Purpose:To investigate the effect of cataract surgery and yellow-tinted intraocular lens (IOLs) implantation on perimetry indices of short-wavelength automated perimetry (SWAP) and standard automated perimetry (SAP) testing in patients with coexisting cataract and glaucoma.Materials and Methods:In this prospective comparative case series, phacoemulsification with implantation of yellow-tinted Acrysof Natural IOL was performed in 16 eyes of 16 patients with visually significant cataract (best-corrected visual acuity (VA) better than 20/120) and mild to moderate glaucoma. Pre- and postoperative values for VA and for perimetry indices including mean deviation (MD), pattern standard deviation (PSD), and foveal threshold (FT) from both SAP and SWAP testing were compared.Results:Postoperative VA improved significantly after cataract surgery and yellow-tinted IOL implantation (P < 0.001). After cataract extraction and IOL implantation, MD and FT on SWAP testing improved significantly (P = 0.001); however, there was no statistically significant change with SAP testing between the pre- and postoperative perimetry indices. There was no statistically significant change in PSD with either SAP or SWAP testing postoperatively. The differences between pre- and postoperative values for all perimetry indices under study were not significant when comparing SAP with SWAP tests, except for MD which had improved statistically significantly in SWAP testing (P = 0.03).Conclusions:In mild to moderate glaucoma patients with cataracts, the perimetry indices of SWAP testing improved after phacoemulsification and yellow-tinted IOL implantation. This suggests that the yellow-tinted IOLs have less effect on SWAP testing than visually significant cataracts.

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“…Even with a shorter follow-up, most previous studies found no detrimental effect of blue light-filtering IOLs on photopic or mesopic contrast sensitivity or on color vision between eyes with blue light-filtering IOLs and eyes with UV light-filtering IOLs (21,22) . Castro et al (23) , using a blue light spectrum filter (simulating an AcriSof Natural IOL) found statistically significant reductions in MD and foveal threshold on SWAP, but not in SAP examinations. However, this study was not conducted for patients with cataract (young patients).…”

Section: Discussionmentioning

confidence: 98%

Effect of aspherical and yellow tinted intraocular lens on blue-on-yellow perimetry

Espíndola

Santhiago

Kara-Júnior

2012

Arq. Bras. Oftalmol.

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Purpose:To investigate the possible effect of aspherical or yellow tinted intraocular lens (IOL) on contrast sensitivity and blue-on-yellow perimetry. Methods: This prospective randomized bilateral double-masked clinical study included 52 patients with visually significant bilateral cataracts divided in two groups; 25 patients (50 eyes) received aspherical intraocular lens in one eye and spherical intraocular lens in the fellow eye; and 27 patients (54 eyes) received ultraviolet and blue light filter (yellow tinted) IOL implantation in one eye and acrylic ultraviolet filter IOL in the fellow eye. The primary outcome measures were contrast sensitivity and blue-on-yellow perimetry values (mean deviation [MD] and pattern standard deviation [PSD]) investigated two years after surgery. The results were compared intra-individually. Results: There was a statistically significant between-group (aspherical and spherical intraocular lens) difference in contrast sensitivity under photopic conditions at 12 cycles per degree and under mesopic conditions at all spatial frequencies. There were no between-group significant differences (yellow tinted and clear intraocular lens) under photopic or mesopic conditions. There was no statistically significant difference between all intraocular lens in MD or PSD. Conclusion: Contrast sensitivity was better under mesopic conditions with aspherical intraocular lens. Blue-on-yellow perimetry did not appear to be affected by aspherical or yellow tinted intraocular lens. Further studies with a larger sample should be carried out to confirm or not that hypotheses. Keywords

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Influence of blue light spectrum filter on short-wavelength and standard automated perimetries

Cited by 11 publications

References 14 publications

Evaluation of a class of polyurethane materials for intraocular lens manufacturing

Evaluation of a class of polyurethane materials for intraocular lens manufacturing

Effect of yellow-tinted intraocular lens on standard automated perimetry and short wavelength automated perimetry in patients with glaucoma

Effect of aspherical and yellow tinted intraocular lens on blue-on-yellow perimetry

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