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  2. Specsavers - Wikipedia

    en.wikipedia.org/wiki/Specsavers

    The chain offers optometry and optician services for eyesight testing and sells glasses, sunglasses, and contact lenses. It also sells hearing aids . In the United Kingdom in 2012, it had the largest single market share of the four major opticians , with 42% of the market.

  3. NHS e-Referral Service - Wikipedia

    en.wikipedia.org/wiki/NHS_e-Referral_Service

    The NHS e-Referral Service (ERS) is an electronic referral system developed for the Health and Social Care Information Centre by IT consultancy BJSS. It is used by NHS England and it replaced the Choose and Book service on 15 June 2015. [ 1 ]

  4. Contact lens - Wikipedia

    en.wikipedia.org/wiki/Contact_lens

    Artist's impression of Leonardo's method for neutralizing the refractive power of the cornea. Leonardo da Vinci is frequently credited with introducing the idea of contact lenses in his 1508 Codex of the eye, Manual D, [9] wherein he described a method of directly altering corneal power by either submerging the head in a bowl of water or wearing a water-filled glass hemisphere over the eye.

  5. Effects of long-term contact lens wear on the cornea - Wikipedia

    en.wikipedia.org/wiki/Effects_of_long-term...

    Long-term contact lens use can lead to alterations in corneal thickness, stromal thickness, curvature, corneal sensitivity, cell density, and epithelial oxygen uptake. . Other structural changes may include the formation of epithelial vacuoles and microcysts (containing cellular debris), corneal neovascularization, as well as the emergence of polymegethism in the corneal endoth

  6. List of soft contact lens materials - Wikipedia

    en.wikipedia.org/wiki/List_of_soft_contact_lens...

    In the US market, soft contact lenses are approved by the US Food and Drug Administration. [2] The American Optometric Association published a contact lens comparison chart called Advantages and Disadvantages of Various Types of Contact Lenses on the differences between them. [3] These include: soft contact lenses; rigid gas-permeable (RGP ...

  7. NHS England - Wikipedia

    en.wikipedia.org/wiki/NHS_England

    NHS England, formerly the NHS Commissioning Board for England, is an executive non-departmental public body of the Department of Health and Social Care. It oversees the budget, planning, delivery and day-to-day operation of the commissioning side of the National Health Service in England as set out in the Health and Social Care Act 2012 . [ 3 ]

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