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Conquer even the smallest type with this handy gadget — complete with a light that allows you to read in bed without irking your spouse.
The function of reading stones was replaced by spectacles from the late 13th century onwards, but modern versions are still in use. [citation needed] In their contemporary form, they can be found as rod-shaped magnifiers, flat on one side, that magnify a line of text at a time, or as large dome magnifiers which
The MNREAD acuity chart or Minnesota low vision reading chart is a text based chart used to measure near visual acuity in people with normal or low vision. [1] It can also be used to measure maximum reading speed, critical print size and the reading accessibility index of a person. [2] Digital and printed types of charts are available. [3]
A dome magnifier is a dome-shaped magnifying device made of glass or acrylic plastic, used to enlarge words on a page or computer screen. They are plano-convex lenses : the flat (planar) surface is placed on the object to be magnified, and the convex (dome) surface provides the enlargement.
ZoomText has dual monitor support and is capable of magnifying the screen up to 60 times; it also allows the user to choose which part of the screen is magnified. Text definition is maintained to preserve legibility. Color controls help improve the clarity of the screen and mouse pointers can be resized.
Such magnifiers can reach up to about 30×, and at these magnifications the aperture of the magnifier becomes very small and it must be placed very close to both the object and the eye. For more convenient use or for magnification beyond about 30×, a microscope is necessary. Fresnel lenses are used as magnifiers, for example for reading ...
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