Repositório Colecção: CF-UM-AEVP
CF-UM-AEVP
https://hdl.handle.net/1822/57385
2024-03-28T16:58:22Z
2024-03-28T16:58:22Z
Assessment of compensation and simulation filters for colour vision deficiency
Alvaro, Leticia
Linhares, João M. M.
Formankiewicz, Monika A.
Waugh, Sarah J.
https://hdl.handle.net/1822/88233
2024-01-22T10:05:52Z
2024-01-22T10:05:51Z
Título: Assessment of compensation and simulation filters for colour vision deficiency
Autor: Alvaro, Leticia; Linhares, João M. M.; Formankiewicz, Monika A.; Waugh, Sarah J.
Resumo: [Excerpt] Compensation filters may improve perception in humans with
Red-Green colour vision deficiency (CVD) whilst simulation filters
may mimic CVD in colour vision normals (CVN). A previous study
(Lillo et al. 2014) showed that Variantor simulation filters mimic
protanopia in a discrimination task when tested only at pseudoachromatic confusion axes. Studies (e.g. Gómez-Robledo et al.
2018) using EnChroma compensation filters (EnChroma, Berkeley,
USA) have not found statistically significant improvements in
colour vision. We aimed to assess effects of simulation (Variantor)
and compensation (EnChroma) filters on perceptual performance
in discrimination and colour naming tasks.
<b>Tipo</b>: conferenceAbstract
2024-01-22T10:05:51Z
Cross-cultural validation into portuguese of a questionnaire to assess computer vision syndrome in workers exposed to digital devices
Cantó-Sancho, Natalia
Linhares, João M. M.
Ronda-Pérez, Elena
Franco, Sandra
Perales, Esther
Seguí-Crespo, Mar
https://hdl.handle.net/1822/87177
2024-02-23T17:39:44Z
2023-11-07T09:56:10Z
Título: Cross-cultural validation into portuguese of a questionnaire to assess computer vision syndrome in workers exposed to digital devices
Autor: Cantó-Sancho, Natalia; Linhares, João M. M.; Ronda-Pérez, Elena; Franco, Sandra; Perales, Esther; Seguí-Crespo, Mar
Resumo: As digital devices are increasingly used at work, valid and reliable tools are needed to assess their effect on visual health. This study aimed to translate, cross-culturally adapt, and validate the Computer Vision Syndrome Questionnaire (CVS-Q©) into Portuguese.; À medida que a utilização de equipamentos
digitais no emprego aumenta, a avaliação do seu efeito na saúde
visual necessita de ferramentas válidas e robustas. Este estudo
teve como objetivo traduzir, adaptar culturalmente e validar para
português o Questionário da Síndrome Visual do Computador
(CVS-Q©).
<b>Tipo</b>: article
2023-11-07T09:56:10Z
Real-time wavefront aberrometry in subjects with accommodative excess
Gomes, Jessica
Sapkota, Kishor
Franco, Sandra
https://hdl.handle.net/1822/87019
2023-10-20T13:30:15Z
2023-10-20T13:30:14Z
Título: Real-time wavefront aberrometry in subjects with accommodative excess
Autor: Gomes, Jessica; Sapkota, Kishor; Franco, Sandra
Resumo: The purpose of this study was to use real-time wavefront aberrometry to detect accommodative excess (AE) and to analyse the optical quality of the eye in subjects with this dysfunction. AE was detected from the accommodative response obtained by real-time wavefront aberrometry. These subjects had a significant accommodative lead to all stimuli and had difficulty relaxing accommodation. The root mean square (RMS) of high order aberrations (HOA) was higher in subjects with AE for lower stimulus and for disaccommodation than in the control group. However, the subjects with AE showed a decrease in the RMS of HOA with an increase in accommodative response. Primary spherical aberration tended to become more negative with accommodation in both subjects and there was no difference between the groups. Real-time wavefront aberrometry can be used as an objective method to detect accommodative excess.
<b>Tipo</b>: conferencePaper
2023-10-20T13:30:14Z
Wavefront sensing for objective assessment of vision therapy efficacy: preliminary results
Gomes, Jéssica Rafaela Moreira
Sapkota, Kishor
Franco, Sandra
https://hdl.handle.net/1822/87016
2023-10-20T12:39:48Z
2023-10-20T12:39:48Z
Título: Wavefront sensing for objective assessment of vision therapy efficacy: preliminary results
Autor: Gomes, Jéssica Rafaela Moreira; Sapkota, Kishor; Franco, Sandra
Resumo: The aim of this study was to use wavefront sensing to objectively evaluate the effects of vision therapy in subjects with insufficiency (AI) and infacility of accommodation (AINF). Aberrometry was performed with a Shack-Hartmann wavefront aberrometer for different accommodative stimuli in one subject with AI and one with AINF before and after treatment with vision therapy (VT). A control subject received a placebo treatment. Real-time accommodative response, accommodation and disaccommodation reaction time, accommodative microfluctuations and root mean square of higher order aberrations were compared before and after VT/placebo. VT was effective and wavefront sensing can be used to detect AI and AINF and evaluate these subjects during VT.
<b>Tipo</b>: conferencePaper
2023-10-20T12:39:48Z
Discrimination of natural colors in anomalous trichromacy and the effects of EnChroma and Vino filters
Marques, Dora Nazaré
Gomes, Andreia Esteves
Linhares, João M. M.
Nascimento, S. M. C.
https://hdl.handle.net/1822/86872
2023-10-15T20:03:21Z
2023-10-15T12:25:45Z
Título: Discrimination of natural colors in anomalous trichromacy and the effects of EnChroma and Vino filters
Autor: Marques, Dora Nazaré; Gomes, Andreia Esteves; Linhares, João M. M.; Nascimento, S. M. C.
Resumo: It is still unclear how well anomalous trichromats discriminate natural colors and whether commercial spectral filters improve performance in these conditions. We show that anomalous trichromats have good color discrimination with colors drawn from natural environments. It is only about 14% poorer, on average, than normal trichromats in our sample of thirteen anomalous trichromats. No measurable effect of the filters on discrimination was found, even after 8 hours of continuous use. Computations of cone and post-receptoral signals show only a modest increase in medium-to-long-wavelength difference signals, which may explain the absent effect of the filters.
<b>Tipo</b>: article
2023-10-15T12:25:45Z