What does the minus sign (-) mean in an eyeglass prescription

Jan 16, 2024 ... These refractive errors are caused by a problem with the shape of your eye. You can't have both at the same time in the same eye, but there is a ... Aug 11, 2021 ... The basic difference between nearsightedness and farsightedness is that farsighted eyes need additional focusing power to see clearly and nearsighted eyes need ... Mar 9, 2021 ... Nearsightedness and farsightedness are types of refractive errors. In both cases, the light is not refracted properly. Jan 11, 2021 ... How to know if you're nearsighted or farsighted and the best ways to treat it · Nearsighted means you can see objects nearby, but far away ... Aug 18, 2024 ... Nearsightedness causes distant objects to appear blurry, while farsightedness makes it difficult to see objects clearly at all ranges. May 28, 2021 ... What is the difference between SPH and CYL in a prescription? SPH, or sphere, is the amount of lens power needed to correct nearsightedness ... Feb 10, 2023 ... You've likely heard the words nearsighted and farsighted in conversation, at an eye exam, or on TV or film. Jun 8, 2021 ... It can be confusing to remember the differences between nearsightedness and farsightedness. In short, nearsightedness means the ability to ... Oct 1, 2022 ... As the distance grows, so do your vision troubles. Someone who's nearsighted doesn't have 20/20 vision. That essentially means that when they're ... Nov 27, 2018 ... 1. American Optometric Association, “Myopia (Nearsightedness).” Accessed Oct. 5, 2018. 2. All About Vision, “Hyperopia (Farsightedness) ...