How to Read an Eyeglass Prescription: Understand the Numbers and What They Mean
To read an eyeglass prescription, look for the sphere (SPH), cylinder (CYL), and axis (AXIS) values for each eye. OD stands for the right eye, and OS refers to the left. A minus sign indicates nearsightedness, while a plus sign means farsightedness. Don’t forget the PD (pupillary distance) for proper lens fitting. Additionally, some prescriptions … Read more