Right eye ( Oculus Dexter ) and Left eye ( Oculus Sinister ).
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 how to buy prescription glasses
Additional magnifying power for reading, often used in bifocals or progressives. 3. Choose Between Online vs. In-Store Right eye ( Oculus Dexter ) and Left eye ( Oculus Sinister )
The primary lens power. Negative (-) means nearsightedness; positive (+) means farsightedness. positive (+) means farsightedness.