Optical element for correcting color blindness

A device for improving color discernment comprising:

• an optical element comprising a luminescent compound in a substantially transparent matrix;
• wherein the optical element absorbs light in a wavelength range near peak sensitivity for an M human cone photopigment and emits light of a longer wavelength in a wavelength range near peak sensitivity for an L human cone photopigment;
• and
• wherein the optical element has a median wavelength of visible absorption, an average wavelength or visible absorption, or a peak wavelength of visible absorption of about 510 nm to about 550 nm.