How to Read a Boots Glasses Prescription: Tips for Understanding the Numbers
To read a glasses prescription, start with the abbreviations. “OD” indicates the right eye, and “OS” stands for the left eye. Check the sphere (SPH) values for nearsightedness or farsightedness, marked with a minus (−) or plus (+) sign. The “CYL” value shows astigmatism. Finally, consider the lens strength measured in diopters for eye health. … Read more