How To Buy | Prescription Glasses

The primary lens power. Negative (-) means nearsightedness; positive (+) means farsightedness.

These indicate if you have astigmatism and the orientation needed to correct it. how to buy prescription glasses

Additional magnifying power for reading, often used in bifocals or progressives. 3. Choose Between Online vs. In-Store The primary lens power

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