Ocular photographer Lawrence Donner, Berkeley, California, 1972-1974. Practice medicine specializing in optometry California and England, since 1975. Clinical instructor, assistant research specialist University California, Berkeley, 1978-1980, assistant clinical professor, associate research specialist, 1980-1988, assistant clinical professor, since 1980.
Consultant United States Forestry Service, Berkeley, 1980-1982, Alameda County Health Department, Oakland, California, since 1980, San Jose Health Department, since 1984, San Diego Health Department, since 1985.
Fellow American Academy Optometry. Member International Research Group on Color Vision Deficiencies, American Optometric Association, Association Research in Vision and Ophthalmology, Alameda County Optometric Association, Contra Costa County Optometric Association, American Association for the Advancement of Science, New York Academy of Sciences.