Light is a powerful source of energy that is used for various biological purposes. Some organisms harness light to produce ATP, the energy currency of cells, while others use light to interpret ...

It is a component of rhodopsin, a protein in the retina that helps the eyes adjust to changes in light levels. Adequate levels of vitamin A are necessary for proper night vision, as well as for ...

When the eyes detect low light for longer than 20 minutes, the body produces the rhodopsin chemical, which triggers our night vision. When the eyes are exposed to bright light, the rhodopsin ...