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A slide rule for calculating the ocular accommodation of an ametrope corrected with a spectacle lens


A slide rule for calculating the ocular accommodation of an ametrope corrected with a spectacle lens



Archives of Ophthalmology 125(7): 940-942



ISSN/ISBN: 0003-9950

PMID: 17620575

DOI: 10.1001/archopht.125.7.940

A slide rule has been designed to calculate the ocular accommodation of an ametrope corrected with a spectacle lens. The slide rule makes the calculation itself easier to perform than with traditional methods and is easily applicable in a clinical setting. In the slide rule, there are 3 scales indicating the power of the spectacle lens, the viewing distance, and the ocular accommodation. The most accurate accommodative unit was used to design the slide rule. The ocular accommodation is the product of the accommodative unit and the dioptric viewing distance. The calculating results are accurate from +21 diopters to all minus powers of the spectacle lens. In a clinical setting, the patients can be advised how much accommodation they exert before and after the refractive surgeries.

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Accession: 014912317

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