![]() Generally, it will range from +0.75 to +3.00 D and will be the same power for both eyes. The number appearing in this section of the prescription is always a "plus" power, even when you don’t see a plus sign. “Add” is the added magnifying power applied to the bottom part of multifocal lenses to correct presbyopia - the natural farsightedness that happens with age. The axis is the lens meridian that is 90 degrees away from the meridian that contains the cylinder power for astigmatism correction. ![]() The number 180 corresponds to the horizontal meridian of the eye. The number 90 corresponds to the vertical meridian of the eye. The axis is defined with a number from 1 to 180. If an eyeglass prescription includes cylinder power, it also needs to include an axis value, which follows the cylinder power. AxisĪxis describes the lens meridian that contains no cylinder power to correct astigmatism. The 90-degree meridian is the vertical meridian of the eye, and the 180-degree meridian is the horizontal meridian. Meridians of the eye are determined by superimposing a protractor scale on the eye's front surface. ![]() The term "cylinder" means that this lens power added to correct astigmatism is not spherical, but instead is shaped so one meridian has no added curvature, and the meridian perpendicular to this "no added power" meridian contains the maximum power and lens curvature to correct astigmatism. If nothing appears in this column, you either don’t have astigmatism, or your degree of astigmatism is so small that it doesn’t need to be corrected. The number in the cylinder column may have a minus sign (for correction of nearsighted astigmatism) or a plus sign (for farsighted astigmatism). It always follows the sphere power on an eyeglass prescription. Cylinder (CYL)Ĭylinder indicates the amount of lens power needed for astigmatism. The term "sphere" means that the correction for nearsightedness or farsightedness is "spherical," or equal in all meridians of the eye. If the number under this heading has a plus sign (+), you are farsighted. If the number under this heading comes with a minus sign (–), you are nearsighted. ![]() Sphere indicates the amount of lens power prescribed to correct nearsightedness or farsightedness. If you're trying to order new glasses online and struggling to translate your prescription correctly, ask your eye doctor or optician to help. Reading your eyeglass prescription can feel like reading a foreign language written in math! Send us feedback about these examples.Trouble translating your glasses prescription? These examples are programmatically compiled from various online sources to illustrate current usage of the word 'spectacled.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. David Wolman, WIRED, With his spectacled face, cozy sweaters, and dry, endearingly sincere style of delivery, comedian Joe Pera is a bit of an enigma in the modern stand-up scene. 2019 For the banker’s gift, Kuhl came up with a bright-orange collage-style image: a mashup of elements taken directly from scans of Indian paper money, the most prominent feature of which is the spectacled visage of Mohandas Gandhi. Elizabeth Depompei, Indianapolis Star, 18 Oct. 2020 At Wild Geese Bookshop, a (sometimes) spectacled skeleton sits by the window with a stack of books, boning up on everything from survival skills to Queen Victoria. 2020 Some called for the return of the green- spectacled guy, others lamented how flat and generic the scheme looked. 2023 Andean Bear The spectacled Andean bear is South America's only bear species. Recent Examples on the Web When the nearly two-foot reptile was caught days later, it was discovered to be a spectacled caiman, a species of crocodile native to Central and South America.
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