The article does cite a previous study that drew the conclusion that photoreceptors in "blind" eyes can detect light, but only after an exposure of 30 minutes. This study, in contrast, used much shorter durations of light and concluded that:
"...the brain can detect light in the absence of working vision. They also suggest that light can quickly alter brain activity through pathways unrelated to sight. The researchers posit that this nonvisual light sensing may aid in regulating many aspects of human brain function, including sleep/wake cycles and threat detection."
Since they did not specify what types of blindness (which can happen via a number of mechanisms, including complete photocereptor death and atrophy) the test subjects were afflicted with, we are left to assume that the test was performed on a wise enough range of subjects that they were able to determine the type of blindness did not matter, and the "sensing" of the light was not connected to any kind of stimulation of the eye at all. Remember, there are types of blindness where the photoreceptors are completely absent.
Instead I believe this study may be backing up the idea that our bodies as a whole can react to light, much like how exposure to certain wavelengths have been shown to help people who are afflicted with a Seasonal Affective Disorder. So the question should be: Is this study confirming that we can detect light via our skin, however slightly?