Chronic dacryocystitis is seen more commonly in females than males. This study was designed to determine why this should be the case. The nasal dimensions were measured and the nasal indexes in patients with chronic dacryocystitis (in both sexes) and in controls were calculated. Both of these values were smaller in females when compared with controls and males. It is concluded that besides other causes, the nasal dimensions in females were predisposing factors for their increased incidence of dacryocystitis.