scholarly journals Color Blindness (Color Vision Deficiency– Daltonism)

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Ana Cristina Selvi Daniel
Keyword(s):  
Color Vision ◽  
Color Blindness ◽  
Color Vision Deficiency

scholarly journals Spectral Filter Selection for Increasing Chromatic Diversity in CVD Subjects

Sensors ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 2023 ◽  
Author(s):  
Miguel Ángel Martínez-Domingo ◽  
Eva M. Valero ◽  
Luis Gómez-Robledo ◽  
Rafael Huertas ◽  
Javier Hernández-Andrés
Keyword(s):  
Color Vision ◽  
Color Blindness ◽  
Normal Observer ◽  
Computational Simulations ◽  
Spectral Filter ◽  
Color Vision Deficiency ◽  
Spectral Filters ◽  
Normal Color Vision ◽  
Selection For ◽  
Color Filters

This paper analyzes, through computational simulations, which spectral filters increase the number of discernible colors (NODC) of subjects with normal color vision, as well as red–green anomalous trichromats and dichromats. The filters are selected from a set of filters in which we have modeled spectral transmittances. With the selected filters we have carried out simulations performed using the spectral reflectances captured either by a hyperspectral camera or by a spectrometer. We have also studied the effects of these filters on color coordinates. Finally, we have simulated the results of two widely used color blindness tests: Ishihara and Farnsworth–Munsell 100 Hue (FM100). In these analyses the selected filters are compared with the commercial filters from EnChroma and VINO companies. The results show that the increase in NODC with the selected filters is not relevant. The simulation results show that none of these chosen filters help color vision deficiency (CVD) subjects to pass the set of color blindness tests studied. These results obtained using standard colorimetry support the hypothesis that the use of color filters does not cause CVDs to have a perception similar to that of a normal observer.

scholarly journals Smartphone Based Image Color Correction for Color Blindness

2018 ◽  
Vol 12 (3) ◽  
pp. 104
Author(s):  
Lamiaa A. Elrefaei
Keyword(s):  
Color Vision ◽  
Color Blindness ◽  
Color Correction ◽  
Experimental Comparison ◽  
Color Vision Deficiency ◽  
Color Blind

<p class="0abstract">Color blind is a type of Color Vision Deficiency, which is the inability that a person could not realize the differences between some colors. There are three types of color blindness: Monochromacy, Dichromacy, and Anomalous Trichromacy. Color blind cannot be cured. Today, technology gets up with solutions to help people with color blindness to see the image and distinguish between the different colors using some algorithms. This paper presents a smartphone based experimental comparison of color correction algorithms for Dichromacy color-blind viewers. This comparison includes LMS Daltonization algorithm, Color-blind Filter Service (CBFS) algorithm, LAB color corrector algorithm, and the shifting color algorithm. The description of the smartphone based implementation details and parameters settings of these algorithms is presented. An application interface is implemented to enable the user to choose the algorithm that gives the most appropriate results. The results of these algorithms are compared to see their strength and weakness.</p>

Two-Dimensional Biocompatible Plasmonic Lenses for Color Blindness Correction

2021 ◽  
Author(s):  
N. Roostaei ◽  
S. M. Hamidi
Keyword(s):  
Color Vision ◽  
Contact Lenses ◽  
Low Cost ◽  
Color Blindness ◽  
Color Filter ◽  
Two Dimensional ◽  
Simple Design ◽  
Plasmonic Lens ◽  
Color Vision Deficiency ◽  
Plasmonic Lenses

Abstract Color blindness, or color vision deficiency (CVD), is an ocular disease that suppresses the recognition of different colors. Recently, tinted glasses and lenses have been studied as hopeful devices for color blindness correction. In this study, 2D biocompatible and flexible plasmonic lenses were fabricated using polydimethylsiloxane (PDMS) and an innovative, low-cost, and simple design based on the soft nano-lithography method. These lenses were investigated for correction of red-green (deuteranomaly) color blindness. The plasmonic lens proposed herein is based on the plasmonic surface lattice resonance (SLR) phenomenon and offers a good color filter for color blindness correction. The biocompatibility, low cost, and simple fabrication of these contact lenses can offer new insights for applications of color blindness correction.

scholarly journals Uso de simulação da visão de daltônicos na avaliação da informação cromática contida em embalagens | The color blinds vision simulation in the evaluation of color information contained in packages

2019 ◽  
Vol 16 (1) ◽  
pp. 76-93
Author(s):  
Wanessa Mayara Braz de Souza ◽  
Carla Patrícia de Araújo Pereira
Keyword(s):  
Color Vision ◽  
Technical Analysis ◽  
Color Blindness ◽  
Qualitative Approach ◽  
Exploratory Research ◽  
Color Coding ◽  
Color Information ◽  
Color Vision Deficiency ◽  
Rgb Images ◽  
Vision Simulation

Deficiências cromáticas visuais, popularmente conhecidas como daltonismo, afetam a capacidade dos indivíduos para identificar e/ou diferenciar cores. Para compreender como a deficiência afeta a percepção de informações cromáticas em embalagens, este estudo utiliza ferramentas de simulação para obter imagens próximas ao modelo de visão das cores observado por estes indivíduos. Realizou-se a análise com três embalagens, selecionadas por conveniência, caracterizando-se como estudo exploratório descritivo, de abordagem qualitativa. Foram constatadas alterações nos níveis de RGB e HSB das cores analisadas, provocando ruído na compreensão das informações cromáticas, uma vez que ocorre a descaracterização as cores originalmente propostas.*****Color vision deficiency, popularly known as color blindness, affects a portion of the population. They affect the ability of individuals to differentiate between colors and, consequently, to interpret information associated with color-coding. Based on this problem, exploratory research was carried out, with a qualitative approach, in which we evaluated the perception of color information contained in packages. The strategy used was the technical analysis, performed by the researchers, using a color blindness simulator. Changes were observed in the levels of red, green and blue (RGB) images, with important modifications in the hue, saturation, and brightness (HSB), decharacterizing the original chromatic design. The use of color blindness simulation allowed the identification of possible noises and ambiguities in the packaging interface.

A Review of Color Blindness for Microscopists: Guidelines and Tools for Accommodating and Coping with Color Vision Deficiency

2015 ◽  
Vol 21 (2) ◽  
pp. 279-289 ◽  
Author(s):  
Douglas R. Keene
Keyword(s):  
Color Vision ◽  
Color Blindness ◽  
Color Images ◽  
Journal Articles ◽  
Web Based ◽  
Color Vision Deficiency ◽  
Green Color ◽  
The Public ◽  
Adobe Photoshop ◽  
And Coping

Abstract“Color blindness” is a variable trait, including individuals with just slight color vision deficiency to those rare individuals with a complete lack of color perception. Approximately 75% of those with color impairment are green diminished; most of those remaining are red diminished. Red-Green color impairment is sex linked with the vast majority being male. The deficiency results in reds and greens being perceived as shades of yellow; therefore red-green images presented to the public will not illustrate regions of distinction to these individuals. Tools are available to authors wishing to accommodate those with color vision deficiency; most notable are components in FIJI (an extension of ImageJ) and Adobe Photoshop. Using these tools, hues of magenta may be substituted for red in red-green images resulting in striking definition for both the color sighted and color impaired. Web-based tools may be used (importantly) by color challenged individuals to convert red-green images archived in web-accessible journal articles into two-color images, which they may then discern.

scholarly journals Color Vision Deficiency in Medical Students in Jammu & Kashmir, India

2019 ◽  
Vol 26 (1) ◽  
Author(s):  
Masarat Nazeer ◽  
Snobar Bashir ◽  
Nadeema Rafiq
Keyword(s):  
Medical Students ◽  
Color Vision ◽  
Medical Profession ◽  
Color Blindness ◽  
Early Management ◽  
Color Vision Deficiency ◽  
Medical College ◽  
Cone Pigments ◽  
Color Vision Deficiencies ◽  
Time Of Admission

Non recognition of any of the three colors is known as color blindness. Color blindness is the commonly used term for deficiency of color vision. Word color blindness is a misnomer as anyone labeled as it, is extremely rare to be totally color blind hence more correctly called color vision deficiencies (CVD). Color vision is a function of three types of cone pigments present in retina. The incidence of Color vision deficiency is common in medical profession and affects the diagnosis and treatment of patients but still it remains the most neglected aspect of vision. Color is very important sign used in medical profession, but there is no effective screening for Color Vision Deficiency (CVD) at any level of medical profession. The present study was undertaken to find out CVD in medical students of Government medical college Srinagar. Material and Method: A total of 300 medical students (MBBS, BDS, NURSING) including 154 males and 146 females between 18-20 years of age were examined for CVD in Medical College using Ishihara pseudoisochromatic plates. After taking history on structured proforma the students were shown Ishihara’s test plates under day light at normal reading distance. Results: Among 154 males, 11 were color deficient (7.14%), and among 146 females, 1 (0.68%) had color vision deficiency. Deutranomalia (41.6%) was the most common type of CVD followed by Protanomalia (25%) then Protanopia (16.7%) and Deutranopia (16.7%), respectively. Conclusions: With this high incidence of color vision deficiency, students with CVD may feel difficulty in day-today practice in medical field. So, screening for CVD in medical students at the time of admission is very important which may help in early management of CVD and with timely counseling proper adaptive strategies can be adopted.

scholarly journals Awareness about Color Blindness among University Student

2019 ◽  
Vol 4 (1) ◽  
Keyword(s):  
University Students ◽  
Color Vision ◽  
Genetic Disorder ◽  
Color Blindness ◽  
University Student ◽  
Color Vision Deficiency ◽  
Specialized Cell ◽  
Basic Purpose ◽  
Awareness Level

Basic purpose of this survey studies was to check awareness level about color blindness among university students. Color blindness is color vision deficiency (CVD), which occurs due to genetic disorder in specialized cell of eye. Patients suffering with color blindness are unable to differentiate between certain colors like red, green and blue. Red-green deficiency is common among all patients. A questionnaire was prepared to estimate awareness of university students about color blindness. It is concluded from this survey studies that mostly students are unaware about etiology and recent treatments of color blindness.

Color-blindness simulation for red-green and blue-yellow ambiguity

2021 ◽  
pp. 1-12
Author(s):  
Sheida Anbari ◽  
Hamid Reza Hamidi ◽  
Shokoh Kermanshahani
Keyword(s):  
Color Vision ◽  
Color Perception ◽  
Color Blindness ◽  
Daily Activities ◽  
Reasonable Accuracy ◽  
Simulation Performance ◽  
Normal Color Vision ◽  
Test Kit ◽  
Different Types ◽  
Color Vision Test

Color blindness has important effects on people’s daily activities, since most activities require a discernment between colors. It is very important for engineers and designers to understand how colorblind people perceive colors. Therefore, many methods have been proposed to simulate color perception of people affected by Dichromacy and anomalous Trichromacy. However, the simulation results rarely have been evaluated with the reports of concerned individuals. In first study, we tried to simulate the color perception of people with different types (red and green) and different degrees of color blindness. Different degrees of red-green deficiency is simulated on the 24-plates brand of the Ishihara color vision test kit. Then simulated plates were tested on people with normal color vision. The results show that the simulation performance is better in the case of high degrees of red-green deficiency. There is also a clear difference between the assessment of female and male volunteers. In another study, the perception of the color of people with blue-yellow blindness is also considered. The proposed blue-yellow blind simulation is compared with the result of another research project. The results show that the color perception of individuals with different degrees of blue-yellow blindness can be reconstructed with a reasonable accuracy.

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