Magnifier
For Reading Information
After the age of about forty you will experience
a problem viewing small print or tiny print and tasks involving close detail work. This eye condition is called
presbyopia and a magnifier for reading will be very helpful
A very high power magnifier for reading 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.
Magnifiers decease light transmission A reading
magnifier with light or magnifier for reading with light will provide better magnification results as
they provide a sharper and clearer image to ease eye fatigue Magnifiers decrease light transmission.
What you should consider in buying a reading magnifier
Hand Held Magnifier . A hand held reading magnifier 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 held magnifier hard to use - Select a hand held magnifier for reading with a power that will allow you to perform
your task at a comfortable distance.
- The higher the power of the shorter the focal
range(work distance) and the smaller the field of view.
- The high power magnifier may not be the best magnifier for you.
- The
hand held magnifier should be comfortable to hold.
- The lens should be distortion free.
Hands Free Reading Magnifier. There are many types of hands free reading magnifiers such
as head magnifier, desk magnifier and magnifier lamps. A hands free magnifier is best for long
term use and a hand held magnifier is used for the short term.
- Not portable.
- Usually more expensive
then a hand held magnifier.
- Larger viewing area.
- Allows use
of both hands,
- Cord/Cordless or both.
- Lighted or unlighted magnifier.
- Allows for long duration use.
Information On Full Page Magnifiers Need help but an ordinary magnifier
only enlarges a small section of the page. A full page magnifier will magnify a whole page. What is full page magnifier for
reading ? - A full
page reading magnifier consists of a Fresnel lens that enables large area magnification.
- Available
as a hand held full magnifier or a hands free full page magnifier.
How does a
full page magnifier for reading work? - A full page magnifier has a focal range of up to 4 inches and does not lay flat on the page.
- Dome magnifiers lay flat on page.
- For best full page magnifier results wear your glasses.
Diopter | Power | Focal Range | | | 3 | 1.75x | 13" | | | 4 | 2.00x | 12" | | | 5 | 2.25x | 8" | | | 7 | 2.75x | 5.5" | | | 8 | 2.00x | 5" | | | 9 | 3.25x | 4.5" | | | 10 | 3.50x | 4" | | | 11 | 3.75x | 3.8" | | | 11.5 | 3.85x | 3.5" | | | 13 | 4.25x | 3" | | |
Eye-chart
provided by Wikipedia . Field Of View: The size of the area being magnified when viewing through
a magnifier lens. The higher the power of the magnifier the smaller the field of view. Diopter: Diopter is a measurement that is used to calculate
the power of a magnifier 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. Magnifier 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 magnifier lens to the object being viewed. Fresnel Magnifier: A flat magnifier consisting of concentric circles
that can be a full page magnifier. 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. Reading Magnifier Information Links The American Foundation for the Blind The National Federation of the Blind National Library Service for the Blind and Physically Handicapped Paths To Literacy National Eye Institute Optometry Cares American Action Fund for Blind Children & Adults MD Support National Eye Health Education Program, |