Progressive lenses are used to correct presbyopia and other disorders of accommodation. The lenses allow the patient to see clearly at a distance and gradually increase in power to also allow the wearer clear vision at both intermediate and near zones. Since the power changes gradually, there is no image jump. There are however, areas of aberration in the peripheral portion of the lens caused by the changing power. Progressive lenses require careful placement relative to the wearer’s pupil center. Incorrect positioning or adjustment can result in adaptation problems.