Color Vision Deficiency is the inability or decreased ability to see color, or perceive color differences, under normal lighting conditions. The way that vision is initiated requires light to travel through multiple media in human eyes, to be absorbed by the receptor cells, transformed into neural signals and eventually interpreted by human brain. While a great number of studies have been made in the past to understand the causes of inherited color vision deficiencies, there is no sufficient analysis on how light can change the perception of colors for defective color visions. Today colors have been widely used in our society for signage, way finding, branding, decoration, etc. Those with color deficiencies might have troubles to distinguish certain colors, which would be essential to understand the environment. Defective color vision might not only be inherited but can also be acquired by diseases. The numbers of color-defectives are significantly increasing due to the growing aged population with diabetes, hypertensions and eye diseases. There is a need to help these individuals to have a better understanding of the spaces with colors. And the thesis attempts to find solutions to enhance the color variations within their perceptions.
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