Source: The Great Interpretation of Dreams (Ibn Sirin)
Looking in a dream indicates contemplation and reflection. Looking at the sky indicates ambition and exaltation. Looking at what God has forbidden indicates committing a sin.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
Looking indicates insight. Whoever sees himself looking with the light of God has received guidance.
Source: Signs in the Science of Expressions (Ibn Shaheen)
Looking is interpreted as good if it is at what is lawful, and as evil if it is at what is forbidden.