TRACHOMA 293 TABLE 7-89. DISTRIBUTION OF TRICHIASIS AND ENTROPION (TIE) BY SELECTED ZONES AMONG ADULTS AGES 15 OR OLDER (NBS 1981) Estimated Population with TIE Estimated Prevalence per 100 Percentage of All TIE in Nepal Intervention by WHO Criteriaa Zone/ Region Sample N 350b 1,666 b 0 2,124 b 4,652 b 704 b 1,995 b 4,243 b 0 2,050 b 3,874 20,526 7,537 3,449 53,170 0.1 0.2 0.0 0.2 0.5 0.1 0.3 0.5 0.0 0.5 3.2 3.6 2.2 0.7 0.6 0.7% 3.2 0.0 4.0 8,7 1.3 3.8 8.0 0.0 3.9 7.3 38.6 14.2 6.5 100.0 Mechi Koshi Sagarmatha Janakpur Bagmati Narayani Gandaki Lumbini Dhaulagiri Rapti Karnali Bheri Seti Mahakali Subtotal Missing TIE 1,359 2,058 2,103 2,394 2,454 2,285 1,893 2,134 284 1,151 312 1,684 968 1,293 22,372 No No No No No No No No No No Yes Yes Yes No status 71 --- Total 22,443 53,170 0.6 100.0 Source:· FRANY.001 AN.22, V304.l a1.0 percent T/E prevalence and 2.0-5.0 percent corneal opacity prevalence. bToo few cases to be reliable. cent. Mobile surgical intervention is thus indicated in Karnali, Bheri, and Seti zones; lid surgery may be offered in other zones from fixed or stationary health facilities. Given the high degree and the nature of geographic clustering of trichiasis and entropion noted previously, it is not surprising that mobile surgery teams are recommended for these three zones. In order to better target the surgical intervention, Tables 7-40 and 7- 41 present the distribution among adults of corneal opacities and trichiasis and entropion by ethnic groups. The Chhetri, Magar, and Tharu groups have particularly high corneal opacity prevalence rates among adults, ranging from l. 7 percent for the Chhetri to 3.5 percent for the Tharu. Only the Magar and Tharu groups have corneal opacity prevalence rates among adults that fall in the WHO- suggested range; they account for one-fifth (21.5%) of the corneal opacities among adults in Nepal. The largest share of the corneal opacities are scattered among 35 other ethnic groups not listed in the tables. For the most part, the adult corneal opacity prevalence
