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Zenni Optical is an American company that sells prescription glasses, sunglasses, and contact lenses online. Founded in 2003, it offers low prices, diverse options, and themed glasses, but has low customer support and return policy.
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.
Eyebuydirect is a subsidiary of EssilorLuxottica that sells prescription and non-prescription glasses online. Founded in 2005, it offers various types of lenses, frames, and features such as facial recognition and social network.
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.
Learn about glasses, also known as eyeglasses and spectacles, which are vision eyewear with clear or tinted lenses mounted in a frame. Find out about corrective, safety, sunglasses and other types of glasses, as well as their history and evolution.