"Blue light filtration typically refers to a coating, which can be applied to corrective prescription lenses or plain lenses," Dr. Jen Tsai, an optometrist in New York City and founder of Line of ...

As light shines steadily on a silver slip of a fish, minuscule dots on the fish start flashing: blue, yellow, blue, yellow. The bodies “do not glow like luminous fish,” Masakazu Iwasaka ...