In cases of microlensing, there is no distortion in shape. However, the amount of light visible from an object changes periodically. This can be used to detect exoplanets. Light from a distant star is bent and enhanced by the gravitational field of a closer star. The presence of an exo-planet rotating around that closer star bends the light of the star farther away periodically. Object OGLE-2005-BLG-390-Lb, discovered 25 January 2006, is the first exoplanet detected by using microlensing.