About the delivery time of the package: We will use USPS in the United States, and we use ePacket in Canada and Europe. (Usually you can receive the package within 15-30 days).
The following situations may require additional price differences
① When the absolute value of your prescription CYL is greater than 2, you only need to enter (± 2), then enter your prescription information normally and submit the order for payment. If the absolute value of CYL is greater than 2, you need to pay a price difference of $10.
② When your pupil distance is less than 65mm, you will need to pay an additional $10
③ Hyperopia (reading glasses):If your prescription contains a "+" number, you will need to pay a difference of $10;
The above situation requires a price difference. After receiving your order, customer service will contact you to make up the difference. We hope you can cooperate, or you can pay the $10 link below. Thank you all and have a wonderful day.
How to choose the refractive index of lenses (1.56/1.61/1.67/1.74)
(The higher the refractive index of the lens, the thinner the lens, and the more comfortable it is to wear)
① If the sum of your SPH and CYL numbers is less than 300 degrees, it is generally recommended to choose lenses with a refractive index of 1.56. Of course, lenses with a refractive index of 1.61/1.67 are also suitable, as they will be thinner and more comfortable to wear.
② If the sum of your SPH and CYL numbers is greater than 300 and less than 500 degrees, generally choose 1.61 lenses. Of course, 1.67/1.74 lenses are also suitable as they will be thinner and more comfortable to wear.
③ If the sum of your SPH and CYL numbers is greater than 500 and less than 800 degrees, generally choose 1.67 lenses. Of course, 1.74 lenses are also suitable as they will be thinner and more comfortable to wear.
④ If the sum of your SPH and CYL numbers is greater than 800 degrees, a lens of 1.74 is generally chosen.
