New contact lenses for people with color blindness

Abu Dhabi: Abdul Rahman Saeed
A research team from the Khalifa University of Science and Technology in Abu Dhabi has developed new contact lenses for people with color blindness, and the researchers used a method that differs from the traditional method that relies on the use of colored pigments, as they used gold nanoparticles that contribute to the purification of red and green light, which is considered a safe method. To see colors clearly, the lenses have high efficiency in light absorption and dispersion.
The research team included Dr. Haider Butt, lecturer in mechanical engineering, Dr. Muhammad Al Sharif, PhD researcher, Dr. Fahd Alam, PhD researcher, and Ahmed Saleh, Master of Science alumnus, all from Khalifa University, in addition to Dr. Allil Yetsin, Associate Professor of Chemical Engineering at Imperial College London.
The researchers explained that people who have difficulty distinguishing between red and green colors face a problem that prevents them from working in fields that mainly rely on color discrimination, and it also has many effects that hinder daily life , such as distinguishing ripe fruits from others or coordinating clothing. The retina of the eye consists of 3 types of cone cells, the first form separates the blue color, the second the green color and the third the red color, where the cone cells work with each other to allow individuals to see all the colors in the eye. the spectrum unless one of them malfunctions.
Dr. Haider said: “The lack of color vision, also known as color blindness, is a genetic defect that affects the eye in a way that limits the ability of the affected individual to distinguish colors, and the lack of red and green vision is the most common type of color blindness, which means that most people who are color blind carry the tools that help to overcome their daily problems related to color discrimination, and the most used of these tools are colored glasses.”
And he indicated that the condition of color blindness, which is more common in men, occurs when the photoreceptors responsible for detecting the color green send information about the color red, and this can be improved by wearing red glasses that are able to make colors appear more vivid, but these glasses are bulky and can be uncomfortable. On the other hand, contact lenses can be used, but their effectiveness varies between patients, in addition to the color pigments that may be insufficient for daily use.
Dr. Haider added: “Research focused on techniques to manage color vision deficiency has shown that tinted contact lenses are expensive and toxic. Therefore, we used gold nanoparticles, which have excellent electrical and optical properties, are non-toxic and have the ability to diffuse light on an efficient way, making them convenient to use.” It has a wide range of biomedical applications and has high light absorption and scattering efficiency.

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