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Book Magnifying Glass Information Book Magnifier-Rules Of Magnification The higher the power of the book magnifier, magnifying glass for books, magnifying
book reader or book magnifying glass, the closer you must get to the object being viewed and the smaller the field of
view. A
very high power may result in an uncomfortable short work distance.Most people are comfortable with a distance of 10
to 12 inches. To strong maybe to close. Select a with a power that will allow a comfortable distance. A book magnifier with light will provide better magnification results as they provide
a sharper and clearer image to ease eye fatigue. Magnifiers decrease light transmission. For best book magnifying results wear your glasses
What you should consider in buying a: Hand Held Magnifier. A hand
held book magnifying glass is compact, portable and usually inexpensive but after a period of time
your hand will tire. Those with a hand tremor will find a hand magnifier hard to use - Hand held book magnifying glass should be comfortable to hold.
- The magnifying
book reader lens should be distortion free.
What you should consider in buying a Hands Free Magnifier A hands
free book magnifying glass is best for long term use and a hand magnifier is used for the short term. - Allows for long duration use.
- Not portable.
- Usually more expensive then a hand
book magnifier.
- Larger viewing area.
- Allows use of both hands
- Cord/Cordless or both.
- Lighted or unlighted magnifier
Types
Of Hands Free Book Magnifiers Binocular Headband Book Magnifier Full Book Magnifier Telesight Magnifier Desktop Magnifier Magnifying Lamps Clip on Magnifier Dome Magnifier Neck Magnifier
Field Of View: The size of the area being magnified when
viewing through a magnifying lens. The higher the power of the magnifying glass the smaller the field of view. Diopter: Diopter is a measurement that is used to calculate
the power of a magnifying lens. The higher diopter will provide higher magnification. Diopter is expressed as "D" Power: Power is how large an object or print increases as
you look through a lens. Magnifying power is expressed as "X" Focal Length: Measurement from the center of the lens to to
the object and be in focus. Focal Range: The distance from the magnifying lens to the object being viewed. Fresnel Magnifier: A flat magnifier consisting of concentric circles that
can magnify a whole page. Visual impairment (or vision impairment) is a decreased
ability to see to a degree that causes problems not fixable by usual means, such as glasses or medication. Our low vision
magnifiers can be of help.     Book Magnifying Glass Links
BookshareNational Library Service for the Blind and Physically Handicapped Paths To Literacy
American Action Fund for Blind Children & Adults MD Support National Eye Health Education Program | 
