§ 542. Composition of the board. The board shall consist of not less than fourteen members, ten of whom shall be physicians representing the specialties of neurology, cardiovascular medicine, internal medicine, family practice, opthalmology, psychiatry, orthopedics, emergency medicine, rehabilitative medicine and gerontology. At least two members of the board shall be lay persons. One member shall be an optometrist and one member shall be a psychologist who respectively are licensed to practice optometry or psychology in the state.