San Blas, san BLAS, Indians is the term for four tribes of Indians that live on the San Blas Islands off the eastern coast of Panama. Most of the 20,000 Indians belong to the Cuna tribe. These Indians live now much as they did before Europeans came to Latin America. Tribal law prohibits marriage with whites. The highest proportion of albino births in the world occurs among the San Blas (see Albino). Experts estimate that about 7 out of 1,000 San Blas are albinos. The albinos gave rise to the myth that a tribe of "white Indians" lived in Panama.