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Learn how to interpret and write an eyeglass prescription that includes sphere, cylinder and axis components. Sphere and cylinder specify the power of the lenses, and axis defines the orientation of the cylinder relative to horizontal and vertical.
Progressive lenses are corrective lenses used in eyeglasses to correct presbyopia and other disorders of accommodation. They are characterised by a gradient of increasing lens power , added to the wearer's correction for the other refractive errors .
Pair Eyewear lets you change your glasses by snapping on different magnetic tops. You can choose from dozens of styles, colors and themes, and save 15 percent with promo code YAHOO15.
Adjustable focus lenses, like single-focus lenses, also reduce image-jump and spatial distortion in the field of view associated with traditional multi-focal lenses. Additionally, the ideal near-vision correction can be achieved with precision, because the variable lenses emulate the focusing action of the youthful (non-presbyopic) eye.
Glasses are vision eyewear with clear or tinted lenses mounted in a frame. They can be used for vision correction, eye protection, cosmetic purposes, or viewing specific visual information. Learn about the different types of glasses, their functions, and their history.
A monocle is a circular lens that corrects or enhances vision in one eye. Learn about its origins, different types, and famous wearers from various fields and periods.
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