Differences Between A Magnifier and A Reading Glasses
The lens of the eye is equivalent to a convex lens. It also works according to the theory of the actual image is inverted and minimized when object distance is greater than 2 times of the focal length. However, eyes to see close objects or distant object are not by changing distance to object or distance to image (because the distance of the lens and the retina are basically the same). It works by the expansion of ciliary muscles to change curvature of the lens to adjust self focal length leading to accurately reflect an image on the retina. Lighting on the retina is conducted to the brain through the nerves to analyze what the "object" is.
Normally, as human lens gets fiberosis and is gradually hardened after age 40, the elasticity of ciliary muscles can be weakened and leading to the eyeball becomes short. Also, focus ability of lens is reduced. The result is to see distant objects clearly, but blurring of near objects. Then the eye condition is called presbyopia. By the condensation of positive meniscus, wearing reading glasses is supplementary and can make image of the object falls on the retina.
Most magnifiers are bi-convex (such as handheld magnifier , loupe , pendant magnifier , pocket magnifier , keychain magnifier , etc.) or plano-convex (bar magnifier an dome magnifier ). But, reading glasses are positive meniscus.
Field of View
Round 3x/6x lighted handheld magnifier with USB charging
Round LED handheld magnifier with USB charging has bifocal lens which provides 3X / 6x magnification and convenient ergonomic handle design. Illuminated magnifying glass for reading of USB charging design keeps you reading everywhere and power life for 7-8 hours / 1time.
3X lighted handheld magnifier with 14 LED lights
Light handheld magnifier 3X baseball bat shape with easy dimmable on/off switch to control the light let people handle any reading environments. The rectangular lens especially simulated the way we naturally view things. This led magnifier is ideal for anyone who strains their eyes to see words on a page because it magnifies and provides light without glare.
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