REFRACTION ANOMALIES IN TANGANYIKAN CHILDREN.
D000293:Adolescent; D001251:Astigmatism; D002648:Child; D006801:Humans; D009216:Myopia; D012030:Refractive Errors; D012572:School Health Services; D013223:Statistics as Topic; D013285:Strabismus; D013636:Tanzania; D014141:Trachoma; D014787:Vision Tests
ADOLESCENCE; ASTIGMATISM; CHILD; MYOPIA; REFRACTIVE ERRORS; SCHOOL HEALTH; STATISTICS; STRABISMUS; TANZANIA; TRACHOMA; VISION TESTS