According to legend, the “medicine Buddha” statue was pulled out of the Sea of Japan by a fisherman whose mother’s eyesight was miraculously restored shortly after the discovery. The Ichibata clergy created the glasses ceremony in response to repeated requests to bless old spectacles. The glasses that are still usable, such as those discarded because of a change in prescription, are donated to a group in India that distributes them to people in need.
(source: www.tricycle.org)