The phenomenon results in the background star's light being warped around a foreground object, causing a distorted image.
If the foreground object is a star with an orbiting planet, we would observe an abnormally bright image.
Some microlensing events, such as MACHO-98-BLG-35 and PA-99-N2, suggest the possible presence of a planetary companion to the lensing star, but this is unconfirmed.
Since microlensing relies on a one-time chance alignment, it is likely not possible to confirm these detections.
Similarly, OGLE-2013-BLG-0723L was initially interpreted as a binary system of a star and a brown dwarf, with a low-mass planet orbiting the brown dwarf, but a model where the system consists of two low-mass stars with no planet was found to be a better fit to the data.