Magnifier Information 

Why do seniors need glasses for reading or close work? A condition called presbyopia causes the loss of elasticity of the lens of the eye, occurring typically in middle and old age. This condition usually starts at about the age of forty and some type of magnification is useful.  

Our large magnifier selection can help  those with presbyopia  and macular degeneration.  

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.