Magnifying glass
A handheld lens — small detail made temporarily large enough to be read.
A magnifying glass in a dream is the dream's image of attention raised, locally, past its usual setting. The lens does not change the world; it changes how much of a small piece of it the eye can take in at once. The dream brings the magnifying glass when something in your life — a contract clause, a face, a piece of evidence in your own behaviour — has been moved under deliberate close examination and is being read at a scale ordinary looking missed. A magnifying glass used carefully and set down is the dream affirming that the close look was the work and is finished. A magnifying glass left in sunlight, scorching what it focuses on, is the dream noting that prolonged close attention turned into a burn, and the thing being studied has been damaged by being looked at this hard.