The sphere measurement, indicated by numbers such as -1. The Role of the Sphere Value The sphere column is the most prominent section of the spectacle rx od os portion of your prescription.
How to Interpret the Numbers in Your Spectacle Rx OD OS Values
Axis Alignment for Precision Complementing the cylinder value is the axis number, which ranges from 1 to 180. The numerical value, such as -3.
Common additions range from +1. Without these distinct labels, the lab would be unable to determine which correction applies to which eye, potentially leading to visual discomfort or headaches.
How to Interpret Sphere, Cylinder, and Axis Values in Your Spectacle Rx OD OS
OD refers to the right eye, derived from the Latin oculus dexter, while OS stands for the left eye, from oculus sinister. Incorrect axis alignment, even with perfect sphere and cylinder values, can result in blurred vision and significant eye strain.
More About Spectacle rx od os
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