The arrangement of the liquid crystal molecules, one of the consequences is selective scattering of light. Arranged under the influence of external forces, liquid crystal materials manufactured devices have great potential. Range between two pieces of glass in Chiral Nematic Liquid Crystal, after a clearance, you can form different textures.
Steroids-LCD, selective reflection of light due to helical structure, using circular polarization in the white light, is made according to the principle of simple thermometer (often seen in the fish tank thermometer). On health care, skin cancer and breast cancer detection is also available on the suspicious paint steroid LCD and color than with normal skin (because the metabolism of cancer cells than normal cells, so the temperature will be higher than normal cells).