Source: The Great Interpretation of Dreams (Ibn Sirin)
(By analogy with glasses and the eye) Contact lenses in a dream indicate an attempt to see matters clearly or change one's perspective on them. They may indicate beautifying one's appearance or hiding a truth.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
(By analogy) They may indicate sharp insight or hidden knowledge. Losing them indicates confusion and being lost.
Source: Signs in the Science of Expressions (Ibn Shaheen)
(By analogy) They are interpreted as worry and anxiety about a matter.