Narrow angle glaucoma---who gets it? what is that?

Serious eye problem: Angle closure is when the outflow of aqueous humor is completely blocked and the eye pressure builds up to dangerous levels potentially causing blindness sometimes within 24 hours. It is more common in Asian and native american populations particularly in alaskan eskimos.

Narrow angles: Narrow angle glaucoma is more common in persons of asian or inuit descent, females, those with family history of narrow angles or narrow angle glaucoma, far-sighted individuals, and older patients. It causes closure of the fluid drainage system of the eye and high pressures in the eyes which can cause optic nerve damage and loss of vision if not treated.