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What you should consider
in buying a
Hand Held Reading Magnifier . A hand 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 hand held magnifier hard to use
- Select a reading magnifier
with a power that will allow you to perform your task at a comfortable distance.
- The higher the power of the magnifier 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.
What you should consider in buying a
Hands Free Reading Magnifier
There are many types of hands free reading magnifiers
for small print such as head magnifier, desk magnifier and magnifying lamps. Hands free magnifiers are
best for long term use and hand held magnifiers are used for the short term
- Allows for long duration use.
- Not portable.
- Usually more expensive then a hand magnifier.
- Allows use of both hands for reading,
- Cord/Cordless or both.
or unlighted magnifier.
Eye-chart provided by Wikipedia
does a magnifier work?
A magnifying glass is a lens through which can be used to make things appear bigger, so you can see them
better. It is used in many applications and manual operations, e.g., for examining postage stamps in philately.
The magnifying glass consists of a piece of convex[ shaped glass or plastic. It has to be held at the right distance between the eye and the object for the object
to be in focus. Wikipedia
Our large magnifier selection
can help those with presbyopia and macular degeneration.
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
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.
Rules Of Magnification.
- The higher the
power of the lens, the closer you must get to the object being viewed and the smaller the field of view.
the power of a lens increases the diameter of the lens decreases.
- Diopter is a term used to determine the power(magnification}of
a lens. The terms are sometimes confused.
power magnifiers such as 8x must be held steady or else they will be out of focus.
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
American Action Fund for Blind Children & Adults
Children's Eye Foundation
Sight for Students
National Eye Health Education Program,