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  2. Ptosis crutches - Wikipedia

    en.wikipedia.org/wiki/Ptosis_crutches

    Ptosis crutches are a little-known option and are an alternative to surgery or eyelids that may not be currently repairable. Many optometrists may be unaware of it or may not know how to install the crutch on an existing pair of eyeglasses. [2] A number of eyeglass companies can install ptosis crutches to new or existing frames.

  3. Corrective lens - Wikipedia

    en.wikipedia.org/wiki/Corrective_lens

    In glasses with powers beyond ±4.00D, the vertex distance can affect the effective power of the glasses. [4] A shorter vertex distance can expand the field of view, but if the vertex distance is too small, the eyelashes will come into contact with the back of the lens, smudging the lens and causing annoyance for the wearer.

  4. Anti-reflective coating - Wikipedia

    en.wikipedia.org/wiki/Anti-reflective_coating

    Uncoated glasses lens (top) versus lens with anti-reflective coating. The reflection from the coated lens is tinted because the coating works better at some wavelengths than others. An antireflective , antiglare or anti-reflection ( AR ) coating is a type of optical coating applied to the surface of lenses , other optical elements, and ...

  5. Progressive lens - Wikipedia

    en.wikipedia.org/wiki/Progressive_lens

    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 .

  6. Astigmatism (optical systems) - Wikipedia

    en.wikipedia.org/wiki/Astigmatism_(optical_systems)

    In the presence of astigmatism, an off-axis point on the object is not sharply imaged by the optical system. Instead, sharp lines are formed at the tangential and sagittal foci. The image at the tangent focus is a short line, oriented in the direction of the sagittal plane; images of circles centered on the optic axis, or small lines tangential ...

  7. Glasses - Wikipedia

    en.wikipedia.org/wiki/Glasses

    Man with glasses. A woman with glasses. Glasses, also known as eyeglasses or spectacles, are vision eyewear with clear or tinted lenses mounted in a frame that holds them in front of a person's eyes, typically utilizing a bridge over the nose and hinged arms, known as temples or temple pieces, that rest over the ears for support.

  8. 15 Decked-Out Superyachts of the Rich and Famous - AOL

    www.aol.com/finance/15-decked-superyachts-rich...

    Superyachts serve as floating palaces for the world’s elite.These opulent vessels, which are larger than most apartments and cost more than a mansion, are often custom-built to reflect the ...

  9. Refractive error - Wikipedia

    en.wikipedia.org/wiki/Refractive_error

    The individual would experience difficulty in near vision, often relieved by reading glasses, bifocal, or progressive lenses. [14] Astigmatism is when the refractive power of the eye is not uniform across the surface of the cornea because of asymmetry. In other words, the eye focuses light more strongly in one direction than another, leading to ...

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