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Large Magnifier Information
After the age of about forty you will experience a problem viewing small print
and tasks involving close detail work. This eye condition is called presbyopia
and magnification is the answer.
What Is a large magnifying glass? A large magnifying glass or big magnifying
glass consists of a large diameter lens.
What large magnifying
glass power do I need? Select
a large magnifying glass or big magnifying glass with a power that will allow you to perform your task
at a comfortable distance.The higher the power of the big magnifying glass or largest magnifying glass the
shorter the work distance.
Do I need
a large magnifying glass with light? A large magnifying glass
with light or large lighted magnifying glass provides a sharper and clearer image then a non-lighted
large magnifying glass. We stock hands free large magnifying glass for reading books.
our large magnifying glass store for large magnifying glass for reading books and big magnifying glass for reading small print, large
magnifying glass with light and extra large magnifying glass for reading
books and newspapers.
big magnifying glass is best? A hand held large magnifying glass is best for short duration use and a hands free large magnifying
glass is best for long duration use.
How does a magnifying glass 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.
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
extra large magnifying glass for reading results wear your glasses.
What is a large magnifying glass Fresnel magnifier?
A large magnifying glass
or big magnifying glass Fresnel magnifier sheet consists of a flat plastic lens with concentric grooves that permits magnified viewing
of a whole page and is the largest magnifing glass for reading.
The focal length of a Fresnel lens large magnifier is about 4 inches from the object to be
Power and lighting.
- The power of the Fresnel magnifying glass is
usually 2X to 4X.
- A Fresnel
large magnifying glass with light produces a clearer image and eliminates eyestrain.
- Our Fresnel magnifiers are LED lighted and
emit a soft white light with less heat.
- Wear your reading glasses for best Fresnel magnifying glass results.
Our big magnifying glass selection can help those with presbyopia and macular degeneration.
Field Of View:
The size of the area being magnified
when viewing through a magnifying lens. The higher the power of the magnifier the smaller the field of view.
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 is how large an object or
print increases as you look through a lens. Magnifying power is expressed as "X"
Measurement from the center of the lens to to the object and be in focus.
The distance from the magnifying
lens to the object being viewed.
A flat magnifier consisting of concentric circles that
can be a full page reading magnifier.
(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 large magnifier models can be of help.
Rules Of Magnification.
- The higher the power of the large magnifier lens, the
closer you must get to the object being viewed and the smaller the field of view.
- As 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.
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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
National Eye Health Education Program