When you receive a new pair of glasses, you might notice a series of numbers printed on the inside of the frame. These numbers aren’t random—they carry important details about your prescription and the fit of your glasses.
The first number often refers to the sphere (SPH), which tells if you’re nearsighted (minus sign) or farsighted (plus sign). The second number is the cylinder (CYL), showing the degree of astigmatism, while the axis indicates its orientation. If you see ADD, it refers to additional power for reading lenses in bifocals or progressives.
You’ll also notice frame measurements: lens width, bridge size, and temple length, which help ensure your glasses sit comfortably and securely.
At Enny Eye Care, our professionals explain every detail so your prescription isn’t just numbers—it’s your key to clear, comfortable vision.