Optical element for correcting color blindness

A device comprising:

• an optical element comprising a coating, wherein the coating comprises a luminescent compound in a substantially transparent matrix;
• wherein the device is configured so that optical element modifies a color of an object or image viewed through the optical element by a user to thereby allow the user to better distinguish colors as a result of absorption and emission of light by the luminescent compound, wherein the optical element is configured to absorb and emit visible light so that when an object or image is viewed through the optical element, a first color having a first set of color coordinates is converted to a second color having a second set of color coordinates to aid in distinguishing colors;
• and the distance between the first set of color coordinates and the second set of color coordinates in the direction normal to a color confusion line nearest to the first set of color coordinates is at least about 0.02 color coordinate units, and wherein the luminescent compound absorbs light at an absorption wavelength and emits light at an emission wavelength, wherein a human cone photopigment is substantially more sensitive to the emission wavelength than to the absorption wavelength, wherein the luminescent compound has an average wavelength of visible absorption of about 380 nm to about 450 nm.