|What type of sheet magnifier for reading should I use? A
hand held magnifying sheet for reading or magnifier sheet for reading should be used for short term
use. A hands free magnifier sheet should be selected for
long duration use.|
What Is A Fresnel Lens? A Fresnel lens for reading purposes consists of a flat plastic sheet magnifier with concentric grooves
on one surface and a flat surface on the other surface
Originally invented by Augustine
Fresnel. The original Fresnel lenses were used to magnify the lighthouse beacon light. A Fresnel lens is thinner
and lighted then a ordinary convex magnifying lens This meant that more powerful and lighter lenses could be used
Fresnel lenses are used
as whole page readers and are called page size magnifying sheet, full page magnifying sheet for reading
books or sheet magnifier.
Read an entire page with our large sheet
magnifier for reading books, full page size magnifying sheet for reading and full sheet magnifiers.
Also known as a magnifying sheet, magnifier sheet, flat magnifier sheet, flat
plastic sheet or sheet magnifier. Available as a hand held magnifying sheet
or a hands free sheet magnifier.
glass 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. starting. https://en.wikipedia.org/wiki/Magnifying_glass#Magnification
A magnifying sheet, magnifier sheet or sheet magnifier consists
of many very narrow concentric ring-shaped lenses, such that the combination acts as a single lens but is much thinner. This
arrangement is known as a Fresnel
Our large magnifying sheet 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
The higher the
power of the magnifying sheet for reading 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 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 magnifying
sheet for reading can be of help.
Large selection of hands free magnifying sheet
for reading books, magnifying plastic sheet, magnifier sheet, hands free magnifying sheet 4x, high power
magnifying sheet 4x and flat magnifying sheet 4x.