sph cyl understanding your glasses prescription
SPH (or Sphere) indicates the eyeglass prescription power, or how strong your lenses need to be to correct your vision. CYL (or Cylinder) indicates astigmatism, a condition where the cornea is irregularly shaped causing blurred or distorted vision. It also tells the lens strength needed to fix it. How to Read Your Eyeglass Prescription Zenni OpticalSphere (SPH) and Cylinder (CYL) always have a (+) or (-) sign. On any prescription, PD can be written in different ways:e.g., 62 (Single PD), 33/31 (Dual PD), or 62/60 (Distance PD/Near PD).
May 06, 2020 · Keep your prescription up to date so these numbers can accurately reflect your visual needs. Typically, youll see several abbreviations and words labeling all of the important data on your prescription. See below to learn the meaning of SPH, CYL Axis, Prism, PD, and more. Understanding Your Glasses Prescription GlassesonspecOct 11, 2016 · SPH (sphere) A + prefix indicates that you that you find it difficult to see things that are close to you. A - prefix indicates that you are short sighted, this means that you find it difficult to see things that are far away. The numbers can vary from a small 0.25 to a 6.00. The higher the number the stronger your prescription. What Does Sphere Cylinder and Axis Mean? RX AnswersDec 01, 2019 · Now that weve discussed sphere, cylinder and axis, lets look at the other main parts of your prescription to round out your understanding. You will see the initials OS and OD written on your prescription. These are abbreviations that denote to oculus sinister and oculus Dexter in Latin and mean left eye and right eye when translated.
Sep 03, 2018 · Cylinder power is always after sphere power in an eyeglass prescription. Axis:The axis defines the location of the sphere and cylinder powers on the lens with a number ranging from 1 to 180. PD:Stands for pupillary distance, the distance between your pupils.What is SPH Glasses? How to Read Your Eyeglass Prescription?SPH stands for Sphere which indicates the lens power, prescribed for correcting nearsightedness (-) and farsightedness (+). The term SPH means the correction for our sight is spherical. It is calculated in dioptre (D). If the sphere number is in negative (-), it means you are nearsighted