GTd from Spain:

The asker, as surprised as everyone reach his riddle, sent this message: "I must thank everyone who participated in my eye exam that showed a picture of a dress white gold or black and blue dress. This was an experiment for me and others in an attempt to show what we had already tried. You will be surprised to know that the dress is actually white and gold. However, there is an explanation of why some viewers are watching black and blue. Scientists have shown that when there is a major event in your life that has a negative effect on the person, his sighting of colors may vary. More than anything is because emotions. "