Understanding Your Vision Prescription: A Clearer Look at the Numbers

 In Fillmore Blog
  • OD and OS: These abbreviations stand for “Oculus Dexter” (right eye) and “Oculus Sinister” (left eye). Each section displays values specific to that eye.

  • Sphere (SPH): This value indicates the lens power needed to correct nearsightedness (negative number) or farsightedness (positive number). The further from zero the number is, the stronger the correction needed.

  • Cylinder (CYL): This value measures astigmatism, an irregularity in the cornea that causes blurred vision at any distance. It’s blank if you don’t have astigmatism.

  • Axis: This number applies only if you have astigmatism and specifies the orientation of the cylindrical lens correction.

  • Add (ADD): In progressive or bifocal lenses, this value indicates how much extra power is needed for near vision.

  • Pupillary Distance (PD): This measurement represents the distance between your pupils and is crucial for lens positioning.
  • Consult your eye doctor: They can explain your specific prescription, answer questions, and address any concerns.

  • Consider lens options: Discuss different lens materials, coatings, and features with your doctor based on your needs and lifestyle.

  • Regular checkups are crucial: Your vision can change over time, so schedule regular eye exams to maintain an accurate prescription.
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