Person:
Bonnin Arias, Cristina Natalia

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First Name
Cristina Natalia
Last Name
Bonnin Arias
URI
https://hdl.handle.net/20.500.14352/79903
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Óptica y Optometría
Department
Optometría y Visión
Area
Optica
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2013 - 20162
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Author: Aguirre Vilacoro, Victoria × End date: 2016 ×

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    Visual Discrimination Increase by Yellow Filters in Retinitis Pigmentosa
    (Optometry and Vision Science, 2016) Cedrún Sánchez, Juan Enrique; Chamorro Gutiérrez, Eva; Bonnin Arias, Cristina Natalia; Aguirre Vilacoro, Victoria; Castro, José J.; Sánchez Ramos, Celia
    PURPOSE: The objective of this study was to evaluate, by halometry and under low illumination conditions, the effects of short-wavelength light absorbance filters on visual discrimination capacity in retinitis pigmentosa patients. METHODS: This was an observational, prospective, analytic, and transversal study on 109 eyes of 57 retinitis pigmentosa patients with visual acuity better than 1.25 logMAR. Visual disturbance index (VDI) was determined using the software Halo 1.0, with and without the interposition of filters which absorb (totally or partially) short-wavelength light between 380 and 500 nm. RESULTS: A statistically significant reduction in the VDI values determined using filters which absorb short-wavelength light was observed (p < 0.0001). The established VDIs in patients with VA logMAR <0.4 were 0.30 ± 0.05 (95% CI, 0.26–0.36) for the lens alone, 0.20 ± 0.04 (95% CI, 0.16–0.24) with the filter that completely absorbs wavelengths shorter than 450 nm, and 0.24 ± 0.04 (95% CI, 0.20–0.28) with the filter that partially absorbs wavelengths shorter than 450 nm, which implies a 20 to 33% visual discrimination capacity increase. In addition, a decrease of VDI in at least one eye was observed in more than 90% of patients when using a filter. CONCLUSIONS: Short-wavelength light absorbance filters increase visual discrimination capacity under low illumination conditions in retinitis pigmentosa patients. Use of such filters constitutes a suitable method to improve visual quality related to intraocular light visual disturbances under low illumination conditions in this group of patients. © 2016 American Academy of Optometry
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    Calidad óptica de los filtros solares de gafas comercializadas en establecimientos no sanitarios.
    (Gaceta de optometría y óptica oftálmica, 2013) Aguirre Vilacoro, Victoria; Bonnin Arias, Cristina Natalia; Chamorro Gutiérres, Eva; Ramirez Mercado, Guillermo; Navarro Valls, Juan José; Lobato Rincón, Luis Lucio; Navarro Blanco, Carolina; Sánchez Ramos, Celia
    OBJETIVO: El objetivo de este estudio es analizar la calidad óptica d elos filtros solares de gafas comercializadas en bazares, top manta y establecimientos no sanitarios en España, comprobando si cumplen la normativa europea vigente (EN 1836:2005+A1:2007). MÉTODO: Se analizó la potencia óptica y las características de transmisión de 192 "supuestas lentes olares" (adulto/niño) mediante el espetrómetro/frontofocómetro Humphrey Lens Analyzer 360 with Spexan, y se comprobó si cumplían la normativa vigente. RESULTADOS: Considerando la tolerancia permitidas por la norma europea, se encontró que un 40% de las lentes analizadas presentaban defectos relacionados con la esfera, un 45% defectos relacionados con el cilindro y un 57% aberraciones prismáticas. Respecto a los requisitos de absorción UV, el 20% de las gafasque se analizaron no cumplen la norma. En algunos casos, las lentes presentaban uno, dos o más defectos. CONCLUSIONES: El análisis de las gafas estudiadas ha mostrado un resultado drmático, ya que el 93% de "las gafas protectoras" disponen de lentes que no cumplen con la normativa vigente.