If you have double vision, your treatment will depend on whether you have double vision in one eye (monocular) or both eyes (binocular), and the underlying cause. Underlying conditions may be treated separately. Read more about the causes of double vision.
curtain. n. 1. a piece of material that can be drawn across an opening or window, to shut out light or to provide privacy. 2. a barrier to vision, access, or communication: a curtain of secrecy. 3. (Theatre) a hanging cloth or similar barrier for concealing all or part of a theatre stage from the audience.
Many people now advocate the use of blackout curtains as practical, energy saving, and perhaps noise-reducing window coverings. A standard curtain may block some light, while others are sheer to partially sheer. Lining almost any type of curtain fabric with very tightly woven material can change the way it works. Provided the curtain can be hung so it covers all parts of the window, it may almost completely block out light.