German scientists have discovered that depression weakens the sensitivity of retina response to colors, which makes our vision fade to grey.
Research group from the University of Freiburg used the so-called electroretinogram to measure people’s ability to detect color contrasts. The experiment involved two groups of individuals, 40 people in each group. The first group contained depressed individuals while the other included non-depressed individuals. Volunteers were asked to look at black and white images resembling chess board. Black and white areas were alternatively changed 12 times per second.
The results showed that depressed individuals had lower retina response to changes from black to white and vice versa compared to healthy individuals. Scientists say it could be the reason depressed people see the world in fading colors.
Source of the image: Photl