Buying glasses online, what should be pay attention?
Here are some tips for you when you want to buy glasses online: 1. Please do not forget to input your PD value, because this is very important, If you do not have a PD in your prescription, please contact your optometrist or your doctor ASAP. Because this measurement is used to accurately center the lenses in the frame that you have selected. Which will also affect the comfort of wearing eyeglasses. 2. If the PD values are higher (and different), like 62/59, then the first number is your Distance PD and the second is your Near PD (for reading-only glasses). 3. Generally speaking, Most adults’ PD’s are between 55-65. Most kids’ PD’s are between 42-54. 4. The SPH value and CYL value should be have the same ± in the normal case, in a few case, it maybe not. 5. In your prescription, if there is a CYL value, at the same time, there must be have AXIS value 6. When you SPH or CYL value is too strong, you’d better select 1.61 index or 1.67 index lenses. 7. When you select the