to study the retinal changes in occupationally exposed pesticide workers , 79 subjects exposed to an organophosphate , fenthion , and 18 exposed to an organochlorine pesticide ddt [ 1,1,1-trichloro-2,2-bis ( p-chlorophenyl ) ethane ] , were subjected to a detailed study , including history taking , physical examination and ophthalmic evaluation .
C0031809
physical
C0220825
evaluation