The shark eyes do tend to appear when they are in crisis. I always think of the shark eyes as their soul dies, i.e., the empathy chip becomes broken and the depression sets in and any feelings/emotions that they have for people get stuffed down in the deepest, darkest part of their soul. As they progress through the MLC, those shark eyes will eventually disappear and the sparkle and clear eyes will return. However, all of this is my own personal opinion.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.