Squinting is read as trying hard to see something clearly that keeps slipping out of focus. Dream books link it to suspicion or to an unclear situation.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.