Part one (first 30 slides) will be epidemiology (illustrated by cataract and by toxoplasmosis, which is often masked by cataract),   and diseases whose disability is sometimes worsened by synergy with a second disease.

Part two will be diseases that are gradually being controlled and diseases associated with environmental causes.

Part three will conclude with some ‘exotic’ diseases most often seen in the tropics, zoonotic diseases, and iatrogenic diseases more common in tropical conditions.