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Johnson's criteria, or the Johnson criteria, created by John Johnson, describe both spatial domain and frequency domain approaches to analyze the ability of observers to perform visual tasks using image intensifier technology. [1]
The test is based on the principle of diplopic projection. [1] Dissociation of the deviation is brought about by presenting a red line image to one eye and a white light to the other, while prisms are used to superimpose these and effectively measure the angle of deviation (horizontal and vertical).
In September 2016, pharmaceutical and medical device company Johnson & Johnson announced they were buying Abbott Medical Optics for $4.3 billion. [13] On February 27, 2017, Abbott Medical Optics changed its name to Johnson & Johnson Vision following its $4.3 billion acquisition by Johnson & Johnson. [14] In 2017, JJV acquired TearScience. [15]
Johnson & Johnson was founded in 1886 by three brothers, Robert Wood Johnson, James Wood Johnson, and Edward Mead Johnson, selling ready-to-use sterile surgical dressings. In 2023, the company split-off its consumer healthcare business sector into a new publicly traded company, Kenvue .
The Maddox Wing test is performed at near with the instrument held in reading position, slightly inferior (approximately 15° depression and 33 cm away). The room or location of the test should be brightly illuminated and the patient's optical correction (e.g. glasses, bifocals, multifocals, contact lens) is required to be worn.
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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 ...