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  2. Cataract surgery - Wikipedia

    en.wikipedia.org/wiki/Cataract_surgery

    Cataract surgery is the most common application of lens removal surgery, and is usually associated with lens replacement. It is used to remove the natural lens of the eye when it has developed a cataract, a cloudy area in the lens that causes visual impairment. [4] [10] Cataracts usually develop slowly and can affect one or both eyes. [4]

  3. Wikipedia

    en.wikipedia.org/wiki/Contact-lenses-brands...

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  4. 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. The gradient starts at the wearer's distance prescription at the top of the lens and reaches a ...

  5. List of Canon products - Wikipedia

    en.wikipedia.org/wiki/List_of_Canon_products

    Canonflex R2000 (1960) – An upgrade with 1/2000 shutter speed (up from 1/1000) Canonflex RP (1960) – simplified Canonflex without the interchangeable prism/viewer. Canonflex RM (1962) – A redesign of the RP with builtin metering and a lower profile prism. Offered with an f/1.2 58mm lens option.

  6. List of Mamiya products - Wikipedia

    en.wikipedia.org/wiki/List_of_Mamiya_products

    Mamiya Automatic 35 EEF (Tower 39, Tower 41) (1961) — zone focus system. Mamiya EE Merit (Honeywell Electric Eye) (1962) — zone focus system. Mamiya 135 EF (1979) — zone focus system. Mamiya 135 AF (1980) — auto-focus. Mamiya U (1981) — zone focus system. Mamiya 135 EF2 (1982) — zone focus system.

  7. Uswitch - Wikipedia

    en.wikipedia.org/wiki/Uswitch

    uSwitch is accredited under the Ofgem Confidence Code, a voluntary code of practice for online domestic price comparison services. uSwitch was involved in the formation of the Confidence Code in 2002 with Consumer Focus, which managed the code until Ofgem took over in 2013. uSwitch.com was previously accredited by Consumer Focus, and played a ...

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