SPH(Sphere/Spherical): This represents the degree of lens power prescribed to address either nearsightedness or farsightedness. If the value beneath this section is preceded by a minus sign (–), it indicates nearsightedness; whereas, if the number has a plus sign (+) or is not preceded by any sign, it signifies farsightedness. The magnitude of the number following the +/- sign indicates the strength of the prescription, with a higher number indicating a stronger prescription.

CYL(Cylinder/Cylindrical): This value represents the lens power for astigmatism, denoted with either a "+" or "-" sign. However, if you see "DS," "SPH," "spherical," or "PL" mentioned under the "CYL" section, it indicates that you do not have astigmatism.

AXIS: This numerical value denotes the orientation of your astigmatism and is measured in degrees, falling within the range of 1 to 180. Whenever an eyeglass prescription includes cylinder power to correct astigmatism, it is crucial to include an axis value as well. The axis value specifies the specific direction of the astigmatism and follows the cylinder power in the prescription, ensuring precise correction for clear vision.

ADD: Abbreviated as "Reading Addition," this represents the extra correction needed for reading. It is utilized to create reading glasses, bifocal glasses, or multifocal glasses, tailored to meet individual vision needs for close-up tasks like reading.

PD(Pupillary Distance): PD stands for Pupillary Distance. It is the measurement, in millimeters, between the centers of your two pupils. Pupillary distance is an essential value in an eyeglass prescription because it helps ensure that the optical centers of the lenses are aligned properly with your pupils. The average adult pupillary distance (PD) value range is typically between 54 and 74 millimeters. If you don't have this number on your prescription. you may ask your eye doctor for it or measure it with our guides.

Prism: Prismatic power corrects vision displacement, aiding conditions like squints. Measured in Prism Dioptre, values can reach up to 10, increasing in steps of ½ or 1 Prism Dioptre.

PL: "PL" stands for "Plano" or "Plano power." Plano indicates that there is no refractive correction needed for that particular aspect of the prescription. In other words, it means that the lens has no optical power and is used when there is no need for nearsightedness (myopia) or farsightedness (hyperopia) correction in that specific part of the prescription.

Base: "base" refers to the orientation of the prism used to correct vision alignment. It can be indicated as BU (Base Up), BD (Base Down), BI (Base In), or BO (Base Out).