The ray of light peeking through the crack creates a blinding effect on the subject. The light is so bright that it blinds her vision, covering her eyes in the photo. The black and white filter makes the ray of light even more bright.
In this picture you are able to see all the emotion on her face because the photographer decided to photograph her so close up. The strip of light shining on only part of her face is whats so intriguing about this picture.