How To Buy Prescription Glasses (2025)

Right eye ( Oculus Dexter ) and Left eye ( Oculus Sinister ).

The primary lens power. Negative (-) means nearsightedness; positive (+) means farsightedness. how to buy prescription glasses

These indicate if you have astigmatism and the orientation needed to correct it. Right eye ( Oculus Dexter ) and Left eye ( Oculus Sinister )

Don't be intimidated by the numbers. Here is a quick breakdown of common terms: how to buy prescription glasses

While most prescriptions include the power of your lenses, many do not automatically include your Pupillary Distance (PD) . Explicitly ask for this measurement during your exam, as it is essential for centering your lenses correctly. 2. Understand Your Prescription