SPH stands for “spherical” and is an abbreviation you’ll see on glasses or contact-lens prescriptions. It tells how strong the lens needs to be to fix your overall vision—whether you’re nearsighted (minus sign) or farsighted (plus sign).
In everyday life, people only glance at the SPH number when ordering new glasses online or comparing prices at the store. If your friend says, “My SPH is –2.00,” they’re simply sharing how strong their lenses are, nothing more dramatic.
Meaning & Usage Examples
-1.50 SPH = mild nearsightedness.
+3.00 SPH = strong farsightedness.
Zero SPH = no distance correction needed.
Context / Common Use
You’ll see SPH printed on every eye-prescription form, right beside CYL (cylinder) and AXIS. When you type your prescription into Warby Parker, Zenni, or any other glasses site, the SPH field is the first box you fill in.
What does SPH 0.00 mean?
It means you don’t need any spherical correction for distance; your eyes see far objects clearly without help.
Is SPH the same as power?
Yes. In glasses talk, “power,” “strength,” and “SPH” all refer to the same number on your prescription.
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