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Non-profit organizations
Abbreviated as NGO, and also known as not-for-profit organisation; an organisation that does not distribute its surplus capital to shareholders or owners, but instead uses them to pursue its original goals.They are usually exempt from income and property tax and most often include charitable organisations, trade unions and public arts organisations.
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Alcoholism
Health care; Cancer treatment
A chronic disease in which a person craves drinks that contain alcohol and is unable to control his or her drinking. A person with this disease also needs to drink greater amounts ...
Atoroidal surface
Eyewear; Optometry
Surface having mutually perpendicular principal meridians of unequal curvature, of which the cross-section in at least one principal meridian is not circular.
Back vertex focal length
Eyewear; Optometry
Distance in an optical system from the back surface to the focal point measured along the optical axis (axis of symmetry).
Auxiliary lenses
Eyewear; Optometry
Additional corrective lenses to facilitate access to higher refractive powers without an excessive numbers of lenses.
Balancing lens
Eyewear; Optometry
Lens fitted to a spectacle frame or mount to balance the weight and/or the appearance of the other lens.
Atoric lens
Eyewear; Optometry
Lens with astigmatic power in which at least one principal meridian is not spherical.
Back surface
Eyewear; Optometry
That surface of the spectacle lens intended to be fitted nearer to the eye.
