Abstract
The opthalmic examination was Performed in Kotsubo village, Zushi city on July 26 and 27, 1958. The results obtained were as follows :
1) The subjects were consisted of 156 men and 261 females, totalling 427, which were equivalent to 11.95 ± 0.56 % of the whole population of Village (according to the investigation made on November 1, 1957) .
2) Trachoma infected 12 men (7.6 ± 2.2 %) and 38 females (14.02 ± 2.2 %) with the higher rate in the latters. The cases were 50 (11.84 ± 1.8 %) in total and 36 (8.37 ± 1.3 %) if except those in the IV stage.
3) Infection rate by ages : It wrs the highest showing 22.5 ± 3.8 % in those of postschool age (more than 16 years), the lowest showing 7.28 ± 1.6 % in those of school age (6-15 years) and 9.52 ± 3.6 % in those of pre-school age (less than 6 years) . A difference was significant in the rates between post-school and school ages but not so from the other group.
4) Distribution by stages and ages : In those aged less than 16 years, 60 % were in the I stage, 32 % in the III and 8 % in the II. In those 20-30 years, only 2 cases were in the III. Those more than 40 years 56.5 % were in the IV and 43.5 % in the III. On observing three divided ages in total, the I stage was 30 %, II 4 %, III 40 % and IV 26 %.
5) Complication was noted in 6 cases, of which 5 females, of the III stage.
