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Reading Magnifying Glass Information Types Of Hands Free
Reading Magnifying Glass Binocular Headband Magnifying Glass Fresnel Magnifying Glass Telesight Magnifying Glass Desktop Magnifying Glass Magnifying Lamps Clip on Magnifying Glass Dome Magnifying Glass Neck Magnifying
As we age our visual acuity decreases and reading and many other tasks become more
difficult and causes strain. This condition is called presbyopia and a reading magnifying
glass will make reading, crafts and hobbies more enjoyable. The advantage of a large reading magnifying glass with light,
reading magnifying glass for books or reading magnifying glass for seniors is that you can read small print without eye
strain. A reading magnifying glass
is available with 2 types of lenses. A Fresnel lens magnifying glass will magnify a whole page and usually
has a power of 2x to 3x. A convex lens magnifying glass will magnify a smaller
area but can have higher powers.A reading magnifying glass with
light will provide better magnification results as they provide a sharper and clearer image and more contrast then
a non-lighted magnifying glass.Select
a reading magnifying glass that will provide a comfortable reading distance which is usually 10" to 12". To
strong maybe to close.
Hand Held Reading Magnifying
Glass A hand magnifying
glass is compact, portable and usually inexpensive but after a period of time your hand will tire. A
hand magnifying glass is used for the short term. - Select a magnifying glass with a
power that will allow you to perform your task at a comfortable distance.
- The high power magnifying glass may not be the best magnifying glass for you.
- The hand held magnifying glass should be comfortable to hold.
- The
lens should be distortion free.
Hands Free Reading Magnifying
Glass A
hands free magnifying glass is best for long term use. - Not portable.
- Usually more
expensive then a hand magnifier.
- Larger viewing area.
- Allows use of both hands,
- Cord/Cordless
or both.
- Lighted or unlighted magnification.
What is full
page reading magnifying glass? A full page
reading magnifying glass consists of a Fresnel lens that enables large area magnification. Available as a hand held full or a hands free page reading magnifying glass. How does a full page reading magnifying glass work? Full page magnifiers have a focal range of up to 4
inches. Page
magnifiers do not lay flat on the page. Dome magnifiers lay flat on page. Power Selection. 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 The high power magnifying glass may not be the best magnifying glass for
you. Our large magnifying glass for reading 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 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 Magnifying Glass : A flat magnifying glass consisting
of concentric circles that can be a magnifying glass.
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 magnifying glass models 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.
- 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.
Reading Magnifying Glass 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 Classroom |