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  2. Intraocular lens power calculation - Wikipedia

    en.wikipedia.org/wiki/Intraocular_lens_power...

    The aim of an accurate intraocular lens power calculation is to provide an intraocular lens (IOL) that fits the specific needs and desires of the individual patient. The development of better instrumentation for measuring the eye's axial length (AL) and the use of more precise mathematical formulas to perform the appropriate calculations have significantly improved the accuracy with which the ...

  3. Eyeglass prescription - Wikipedia

    en.wikipedia.org/wiki/Eyeglass_prescription

    Using a phoropter to determine a prescription for eyeglasses. An eyeglass prescription is an order written by an eyewear prescriber, such as an optometrist, that specifies the value of all parameters the prescriber has deemed necessary to construct and/or dispense corrective lenses appropriate for a patient.

  4. Radial keratotomy - Wikipedia

    en.wikipedia.org/wiki/Radial_keratotomy

    The boy, who required eyeglasses for correction of myopia caused by astigmatism, fell off his bicycle. His glasses shattered on impact, and glass particles lodged in both eyes. To save the boy's vision, Fyodorov performed an operation which consisted of making numerous radial incisions extending from the pupil to the periphery of the cornea in ...

  5. Presbyopia - Wikipedia

    en.wikipedia.org/wiki/Presbyopia

    Presbyopia can be corrected using glasses, contact lenses, multifocal intraocular lenses, or LASIK (PresbyLASIK) surgery. [2] [7] [4] The most common treatment is glass correction using appropriate convex lens. Glasses prescribed to correct presbyopia may be simple reading glasses, bifocals, trifocals, or progressive lenses. [4]

  6. Nd:YAG laser - Wikipedia

    en.wikipedia.org/wiki/Nd:YAG_laser

    Slit lamp photograph of posterior capsular opacification visible a few months after implantation of intraocular lens in eye, seen on retroillumination. Nd:YAG lasers are used in ophthalmology to correct posterior capsular opacification, [6] after cataract surgery, for peripheral iridotomy in patients with chronic [7] and acute angle-closure glaucoma, [8] where it has largely superseded ...

  7. National Health Service (England) - Wikipedia

    en.wikipedia.org/wiki/National_Health_Service...

    The NHS was established within the differing nations of the United Kingdom through differing legislation, and as such there has never been a singular British healthcare system, instead there are 4 health services in the United Kingdom; NHS England, the NHS Scotland, HSC Northern Ireland and NHS Wales, which were run by the respective UK government ministries for each home nation before falling ...

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