Ophthalmic Wearable Devices for Color Blindness Management

Salih, Ahmed E.; Elsherif, Mohamed; Ali, Murad; Vahdati, Nader; Yetisen, Ali K.; Butt, Haider

doi:10.1002/admt.201901134

Cited by 39 publications

(55 citation statements)

References 54 publications

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“…Enchroma and VINO glasses are some of the most widely used wearables by CVD patients, and their design and transmission blockage varies per the patient’s needs. 16 The transmission dip of Enchroma was far from that of the Atto dyed lens, the 12 and 40 nm gold nanocomposites. Indeed, Enchroma’s transmission dip was more than 30 nm away from that of the latter mentioned lenses.…”

Section: Resultsmentioning

confidence: 94%

“…The most common wearable is a form of tinted glass/lens. 16 , 17 Furthermore, the principle behind using the filters was introduced by Seebeck who claimed that when red and green filters are placed successively, protans and deutans are able to differentiate between shades of indistinguishable colors. 17 This was later developed into lenses and glasses by different companies; of these companies, Enchroma is the most well-known for providing tinted glasses.…”

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confidence: 99%

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Gold Nanocomposite Contact Lenses for Color Blindness Management

et al. 2021

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Color vision deficiency (CVD) is an ocular congenital disorder that affects 8% of males and 0.5% of females. The most prevalent form of color vision deficiency (color blindness) affects protans and deutans and is more commonly known as “red–green color blindness”. Since there is no cure for this disorder, CVD patients opt for wearables that aid in enhancing their color perception. The most common wearable used by CVD patients is a form of tinted glass/lens. Those glasses filter out the problematic wavelengths (540–580 nm) for the red–green CVD patients using organic dyes. However, few studies have addressed the fabrication of contact lenses for color vision deficiency, and several problems related to their effectiveness and toxicity were reported. In this study, gold nanoparticles are integrated into contact lens material, thus forming nanocomposite contact lenses targeted for red–green CVD application. Three distinct sets of nanoparticles were characterized and incorporated with the hydrogel material of the lenses (pHEMA), and their resulting optical and material properties were assessed. The transmission spectra of the developed nanocomposite lenses were analogous to those of the commercial CVD wearables, and their water retention and wettability capabilities were superior to those in some of the commercially available contact lenses used for cosmetic/vision correction purposes. Hence, this work demonstrates the potential of gold nanocomposite lenses in CVD management and, more generally, color filtering applications.

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Section: Resultsmentioning

confidence: 94%

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confidence: 99%

Gold Nanocomposite Contact Lenses for Color Blindness Management

et al. 2021

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“…However, the absorbance of the lens can be controlled by changing the dye concentration. [6,18,19] A double layer contact lens was fabricated utilizing both Atto dyes. The dyes were cross-linked in the double layer lens separately ( Figure 3e).…”

Section: Resultsmentioning

confidence: 99%

“…The activation levels for the cone cells for 530 nm incident light on normal eyes and for those suffering from different types of CVD. [6,18] www.advancedsciencenews.com www.advmattechnol.de…”

Section: Introductionmentioning

confidence: 99%

Contact Lenses for Color Vision Deficiency

Elsherif

Salih

Yetisen

et al. 2020

Adv Materials Technologies

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Color blindness or color vision deficiency (CVD) affects around 4.5% of the population in Europe. There have been several attempts to assist color‐blind individuals using color filter glasses. Here, contact lenses are developed to assist individuals suffering from color blindness. Two dyes (Atto 488 and 565) that provide the desired absorption wavelength ranges are selected to be immobilized in soft contact lenses. The chosen dyes have absorption bands in wavelength ranges of 480–500 and 550–580 nm. Both dyes are individually immobilized in contact lenses, and over 95% of the light in the undesired ranges are blocked. The dyes do not diffuse out from lenses in artificial tears and contact lens storage solution. Performances of the developed contact lenses are compared to commercial color‐blind glasses. The contact lenses are tested in color vision deficient patients using Ishihara test. Participants indicate enhancement in the visibility of the colors and their contrast in a color rich environment. The proposed contact lenses show enhanced results as compared to commercial color‐blind glasses in indoors and achieved similar outcomes outdoors.

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“…Accessibility of the colour blind ensures that only colour should not be a distinguishing feature for data perception. The works [17]- [20] focus on improving the accessibility of colour blind people. Wearables like the Enchroma glasses [21] support them to differentiate between different colours and such a wearable can assist them with a chart image too.…”

Section: B Chart Comprehensionmentioning

confidence: 99%

Towards Assisting the Visually Impaired: A Review on Techniques for Decoding the Visual Data From Chart Images

Shahira

Lijiya

2021

IEEE Access

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The textual data of a document is supplemented by the graphical information in it. To make communication easier, they contain tables, charts and images. However, it excludes a section of our population -the visually impaired. With technological advancements, the blind can access the documents through text to speech software solutions. In this method, even images can be conveyed by reading out the figure captions. However, charts and other statistical comparisons which involve critical information are difficult to be "read" out this way. Aim of this paper is to analyse various methods available to solve this vexatious issue. We survey the state-of-the-art works that do the exact opposite of graphing tools. In this paper, we explore the existing literature in understanding the graphs and extracting the visual encoding from them. We classify these approaches into modality-based approaches, conventional and deep-learning based methods. The survey also contains comparisons and analyses relevant study datasets. As an outcome of this survey, we observe that: (i) All existing works under each category need decoding in a variety of graphs. (ii) Among the approaches, deep learning performs remarkably well in localisation and classification. However, it needs further improvements in reasoning from chart images. (iii) Research works are still in progress to access data from vector images. Recreating data from the raster images has unresolved issues. Based on this study, the various applications of decoding the graphs, challenges and future possibilities are also discussed. This paper explores current works in the extraction of chart data, which seek to enable researchers in Human Computer Interaction to achieve human-level perception of visual data by machines. In this era of visual summarisation of data, the AI approaches can automate the underlying data extraction and hence provide the natural language descriptions to support visually disabled users.

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Ophthalmic Wearable Devices for Color Blindness Management

Cited by 39 publications

References 54 publications

Gold Nanocomposite Contact Lenses for Color Blindness Management

Gold Nanocomposite Contact Lenses for Color Blindness Management

Contact Lenses for Color Vision Deficiency

Towards Assisting the Visually Impaired: A Review on Techniques for Decoding the Visual Data From Chart Images

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