To dream of wearing contact lenses foretells that strangers will cause changes in your affairs.
If you dream of losing a lens, or not being able to see clearly through them, it signifies that you are having trouble making good judgments these days. Don’t rush into any big decisions!... My Dream Interpretation
Psychological / emotional perspective: When a lens appears in a dream we need to be clear as to whether it is enlarging the object being looked at, or is intensifying it. Enlarging it suggests taking a wider viewpoint, intensifying it requires that we pay attention to detail.
A full interpretation can only be made in the light of other circumstances in the dream.
It is the context of the dream that is important.... Dream Meanings of Versatile
Material aspects: Just as in everyday life a lens helps to focus the attention, so in dreams it can signify our need to perceive something very clearly. You might also like to consult the entries for glasses / spectacles, goggles and magnifying glass.... Dream Meanings of Versatile