Concerning visual diagnostics it is recommended, will get acquainted with works of the president of the Russian Academy «therapy Su Jok» Park Jae Woo which methods are widely applied in many medical institutions and are brought in lecture courses of medical schools (concerning Su Jok of therapy it is possible will visit an official site Su Jok Academy or sites : http://www.altmedsujock.com http://sant.narod.ru/sy.htm In more details about visual diagnostics read in the book «Lectures on Su Jok acupuncture», a part 1, prof. Park Jae Woo, Su Jok Academy, Moscow, 1998, p. 104-124.