Magnifying glasses shrink the entire directory page and currently show; Magnifying glass is a lens, which makes the objects appear larger. All the scientists, jewelers, use these glasses.
 
Magnifying glasses are used in 2 broad categories:

1) Reading things that weren't too small when you are young.
2) Seeing very small things you could never really see to begin.

Mostly jewelers use costly magnifying glasses to recognize diamonds and other gems that are real or not. Like in some places the use of magnifying glasses is rarely done. The sizes of magnifying glasses do occur the higher the magnification the smaller the lens. When you use a high-powered magnifier it is held always in front of your eyes so that the lens is bigger than your pupil that you need. The very small part of your eye sees what is right in front of you at the highest resolution. If you magnify something a lot the image overflows and you don't see the part clearly that is called peripheral vision.

There are 3 types of magnifying glasses:

1) Linen tester: These testers are used in schools, industry, home, and for promotional activities. This tester is also known as thread counter, pick counter or loupe glasses this tester have glass lens for optimum clarity for eg: 19mm magnifier is ?".

2) Grade metal linen tester: The linen tester 10x and 8x models are good for inspecting coins, stamps and micro printing. The 6x models are good for textile work and promotional products.

3) Giant folding magnifier: The giant folding magnifier is handy for large rock studies such as geodes.  The small linen tester is ideal as promotional products. Since the vertical section has a room for printing logos up to 2" by 1.25".

Geology lenses for earth science foldout magnifying glasses:

a) Foldout magnifying glasses are used in biology, geology and reading compact aids.
b) Plastic cased magnifiers are good for insect, plant or tree leaf identification.
c) Hasting triplet geology loupes: It consists of three lenses cemented together for true
       colour clarity.   
d) Doublet geology lens for micro minerals: It is suitable for field studies.

There is nothing more important then taking care of your eyes. Visit the authors website at:
http://www.easyeyecontacts.com