In the course of 36 years, Steffan, among 129,865 cases of eye disease, found trachoma 5193 times, 2523 times in the cicatricial stage. The number of cases decreased from year to year. The subjects were mostly laborers in Frankfort who lived in the neighborhood. Residents of the town were rarely affected.
According to Onisi, trachoma makes up 25% of all the eye diseases in Japan. It attacks patients of any age, but is most frequent between the ages of fifteen and thirty. 24% of the trachoma patients have pannus.
A look at the past . . .. Arch Ophthalmol. 1999;117(8):1080. doi:10.1001/archopht.117.8.1080