Depending on your age gap we recommend you the following standard strengths: 40's years old +1.00 to + 1.75 50's years old +2.00 to + 2.75 50 years old+ +3.00 to + 3.50
We require a PD to create the most accurate reading glasses possible. This is what makes our reading glasses more comfortable than the ones sold in a drugstore. However if you prefer we can still proceed and make your glasses without your PD. Please let us know how would you like to proceed.