The present invention relates to a method for avoidance of blue light damage by using a stem cell composition. The stem cell composition comprises 10% (v/v) to 50% (v/v) of the conditioned medium of Wharton's Jelly mesenchymal stem cells. The conditioned medium of Wharton's Jelly mesenchymal stem cells is prepared by culturing Wharton's Jelly mesenchymal stem cells in a medium containing human basic fibroblast growth factors for 2 to 5 days, and collecting the medium for centrifugation and filtration.
