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Toys and games
1) Devices that are used exclusively for recreation and play. Toys are most often used with children and pets and as a medium of education and development. Toys are not always obvious in their nature. A simple bottle can be considered a toy if an individual uses it for recreational use. 2) Games are structural activities used for physical or psychological education. In most cases, games are recreation. However, games can also be considered work. For example, a professional soccer game is a career to the participants.
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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.
