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Why you may need a hand magnifier.
When you are having trouble viewing print or objects
it may be time for a hand held magnifying glass.
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.
is a hand held magnifying glass?
A magnifying glass (called
a hand lens in laboratory contexts) is a convex lens that is used to produce a magnified image of an object. The lens is usually mounted in a frame with a handle (see image). A magnifying glass can be used to focus light, such
as to concentrate the sun's radiation to create a hot spot at the focus for fire starting. https://en.wikipedia.org/wiki/Magnifying_glass
What you should consider in a hand held magnifying
Magnifier glass power and work distance:
· Select magnifiers 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).
· The high power magnifier may not be the best magnifier for you.
For best hand held magnifying glass results wear your glasses.
A hand magnifying glass is also helpful
for vision impaired eye conditions such as:
held magnifiers with light are inexpensive, portable and will eliminate eye strain and their is large
selection to choose from.
Shop our store for high
quality hand held magnifying glass with light (hand held lighted magnifying
glass) that is available in many powers and lens sizes.
held magnifiers are light weight, compact and portable as compared to a hands free stand magnifier
How does a magnifying
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. The magnifying glass usually comes with a handle. Wikipedia
What type magnifier is best? Hand held magnifiers
are best for short duration use and a lighted magnifying lamp or hands free magnifier with stand are
best for long duration use.
Magnifier glass power and work distance: Select a hand held magnifying glass with light with a
power that will allow you to perform your task at a comfortable distance.
higher the power of the hand held magnifier the shorter the focal range(work distance) and the smaller the field
The high power magnifier may not be the best magnifier for you. Our large magnifier selection can
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: 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
Power: Power is how large an object or print increases
as you look through a lens. Magnifying power is expressed as "X"
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.
Fresnel Magnifier: A flat magnifier consisting of concentric circles
that can be a full page reading 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
hand held 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.
- 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.
Hand held magnifiers are used for reading and crafts. Below are informative links.
Knitting, Crochet, and other Needlecrafts
How To Knit
How To Knit Beginners
How To Sew
Basic Sewing Stitches
How to Crosstitch
How To Do Needlework
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