| 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 type magnifier is best? Hand held magnifiers are best for short
duration use and a magnifying lamp or hands free clip on magnifiers are best for long duration
use. Magnifier glass power and work distance: Select a clip
on magnifier for sewing with a power that will allow you to perform your task at a comfortable distance.
The higher the power of the clip on magnifier for sewing 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. 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 magnifying lens. The higher the power of the clip on 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 "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 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 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.
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