An African expedition

Dear Editor:

I embarked on a memorable trip to Africa recently and, along with a wonderful team of skilled ophthalmologists and nurses, we set up two eye camps in Namibia and Zambia. Our mission was to study corneal thickness in native Africans so that we could, in the future, establish the relationship between corneal thickness and glaucoma in this population.

According to the results of Toh et al in a classic twin study, central corneal thickness is highly heritable.³