An eyeglass prescription contains the sphere (SPH) value, which indicates lens power. A minus sign (−) shows nearsightedness, meaning you see better up close but need help with distance vision. A plus sign (+) indicates farsightedness, meaning you see better at a distance, requiring correction for near vision.
Cylinder and axis values correct astigmatism, which is an irregular curvature of the eye. The cylinder indicates the lens power needed to correct this condition, while the axis shows the orientation of the cylinder in degrees.
Pupillary distance is the distance between the center of your pupils. This measurement ensures that lenses are aligned correctly with your eyes for optimal vision correction.
When you gather these numbers, you can accurately communicate your vision needs to an optician. A precise prescription is crucial for comfortable and effective vision aids.
Understanding these essential numbers allows you to make informed decisions regarding your eyewear. Next, we will explore how to interpret each number in a prescription and its implications for choosing the correct lenses.
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