The human eye produces visual induction through the visual cells with photosensitive properties in the retina to feel the incident visible light. The visual cells in the retina of the human eye include rod cells and cone cells, two kinds of visual light-sensing cells, among which cone cells distinguish colors and details of objects.
Cones can be divided into three types: L, M, and S. Each type of cone has different spectral response to different bands of the incident spectrum. When light hits the human eye, it reaches the S,M and L photoreceptor cells, forming three channels of signals, which are transmitted to the cerebral cortex for mixed processing (similar to the RGB color system), so that humans can perceive the world’s colorful colors.
In normal human eyes, L-type cones and M-type cones are coordinated in number and function. Abnormal color vision occurs when there is a loss of number or function in the L and M cones (the spectral response curves of the M and L cones are close or even overlap), which is a common red-green vision abnormality.
When the number or function of M-type cones is abnormal, the color vision is green. When the L-like cones are abnormal in number or lack of function, the color vision is called red vision.
The reddish-green color disorder is a congenital disorder controlled by an invisible gene. There are no drugs or other medical methods to treat or correct this color disorder.
Based on the above mentioned mechanism of human red-green abnormal symptoms, a strategy was proposed and designed for individuals with red-green abnormal symptoms that could significantly improve the human color resolution ability.
That is, before the incident light enters the human eye, it is modulated to a certain extent: the part of the spectrum whose peak response wavelength of class M and class L cones is shifted is effectively filtered.
In this way, the color resolution caused by these abnormal overlapping parts of the spectral response can be eliminated, and the color resolution weight of the non-overlapping parts of the spectral response can be increased, and the color resolution ability of human body can be significantly improved.
How to realize this complex multi-narrowband spectral modulation? This function is realized by designing several complex optical film systems.
Color enhancement scheme, through spectral modulation, light separation, color enhancement to help people with abnormal color vision to see a different colorful world!
Color enhancement can greatly improve chroma and color recognition, most of the color saturation can be increased by more than 20%, especially red, green and blue primary colors.
Color correcting glasses are optical assistance and do not cure color blindness/weakness. Depending on the type and degree of aberration of color blindness/weakness in individuals, color enhancement glasses have a significant effect on approximately 80% of patients with red-green color blindness.