Cal. Business and Professions Code § 3147.6

Except as otherwise provided by Section 114, a license that is not renewed within three years after its expiration may be restored, and a retired license issued for more than three years may be reactivated to active status, if no fact, circumstance, or condition exists that, if the license were restored, would justify its revocation or suspension, provided all of the following conditions are met: (a) The holder of the expired license or retired license is not subject to denial of a license under Section 480. (b) The holder of the expired license or retired license applies in writing for its restoration or reactivation on a form prescribed by the board. (c) The holder of the expired license or retired license pays the fee or fees as would be required of him or her if he or she were then applying for a license for the first time. (d) The holder of the expired license or retired license satisfactorily passes both of the following examinations: (1) The National Board of Examiners in Optometry’s Clinical Skills examination or other clinical examination approved by the board. (2) The board’s jurisprudence examination. (e) After taking and satisfactorily passing the examinations identified in subdivision (d), the holder of the expired license or retired license pays a restoration fee equal to the sum of the license renewal fee in effect on the last regular renewal date for licenses or a reactivation fee determined by the board, and any delinquency fees prescribed by the board.