Analysis of information sources in references of the Wikipedia article "The Pact (2012 film)" in English language version.
The eyes thing was actually explained a little more in a cut piece of dialogue from the cousin character, where she remarks on Annie's eyes being different colors – she said in the script, "Your mother didn't have them, so your father must've." I hope that explains it a little more…
The sequence is a dream – she falls asleep in the hotel, then we cut to her dream. I wanted to end with the idea that she's haunted by what happened.