Principles of therapy -- Ocular drug delivery and toxicology -- Methods for evaluating drug-induced visual side effects -- The role of electrophysiology and psychophysics in ocular toxicology -- National registry of drug-induced ocular side effects -- Herbal medicines and dietary supplements: an overview -- Drug-induced ocular side effects -- Chemical-induced ocular side effects -- Herbal medicine and dietary supplement induced ocular side effects -- Index of side effects.