Hello, I went to my eye Dr yesterday to get new glasses and I asked for my prescription today morning but they gave me this numbers LF eye -4.00 -1.00 180
RG eye -1.75 180
Why does my left have 2 different numbers but my right just one?
Thanks!
In: Other
* **LF eye (Left Eye):** -4.00 | -1.00 | 180
* **RG eye (Right Eye):** -1.75 | N/A | 180
The numbers represent SPH | CYL | Axis; these are broken down below.
**Sphere (SPH)** indicates the strength of the lens needed to correct nearsightedness or farsightedness. A negative number (-4.00 for the left eye and -1.75 for the right eye) indicates nearsightedness (difficulty seeing distant objects clearly). The higher the number, the stronger the prescription.
**Cylinder (CYL)** refers to the strength of the lens needed to correct astigmatism, which is an irregular curvature of the cornea or lens. A cylinder value of -1.00 for the left eye suggests there is astigmatism present, while there’s no astigmatism indicated for the right eye.
**Axis** specifies the orientation of the cylindrical correction needed for astigmatism. For the left eye, the axis is 180 degrees, meaning the cylindrical correction is needed along the horizontal meridian (a line running horizontally across the eye, dividing it into upper and lower halves). The same axis (180 degrees) is mentioned for the right eye, although there’s no cylinder correction for that eye.
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