Psoriasis can affect the nails and produces a variety of changes in the appearance of finger and toe nails. Nail psoriasis occurs in 40â45% of people with psoriasis affecting the skin and has a lifetime incidence of 80â90% in those with psoriatic arthritis.
Color & Vision Matters. The human eye can see 7,000,000 colors. Some of these are eyesores. Certain colors and color relationships can be eye irritants, cause headaches, and wreak havoc with human vision. Other colors and color combinations are soothing. Consequently, the appropriate use of color can maximize productivity, minimize visual fatigue, and relax the whole body.
Different wavelengths of visible-light are perceived by human eye as different colours. VL having wavelength ranging between 620 to 780 nm is seen by human eyes as red colour. On the other hand, visible light having wavelength ranging between 390 nm to 455 nm is seen as violet colour.