The CYL values you've inserted are not correct! The total value of the Sphere and Cylinder must not exceed 10.
The AXIS values you've inserted are not correct! If CYL value is higher or lower than 0, AXIS values can't be 0.
You've inserted 1 positive and 1 negative value, which is very rare. We suggest double checking your prescription. If this is correct, you can proceed.
By clicking on continue, you will be skipping the prescription step. We'll ask for it after your order, either by uploading it or having us call your doctor.
Understanding Your Prescription
Right Eye (OD)
OD stands for "oculus dexter," which is Latin for "right eye."
Sphere (SPH)/Power (PWR): This indicates the strength of your prescription. A minus (-) value signifies nearsightedness, while a plus (+) value signifies farsightedness.
Axis: This is relevant only for those with astigmatism. The axis, a number between 0 and 180, determines the orientation of the Cylinder (CYL).
Left Eye (OS)
OS stands for "oculus sinister," which is Latin for "left eye."
Cylinder (CYL): This is also for those with astigmatism, where one part of the eye needs more correction than the rest. The Cylinder value is written with a minus (-) sign.
How to Measure Your Pupillary Distance (PD)
Your Pupillary Distance, or PD, is the distance in millimeters (mm) from the center of one pupil to the center of the other. This information is usually listed on your prescription details as PD, or separately as RPD (Right PD) and LPD (Left PD). If provided as RPD and LPD, you can simply sum them up and enter the result. If the PD for your left and right eyes are different, please leave the description information blank. Our lab colleague will contact you by email for further assistance.
You can measure your PD yourself by following these steps:
Grab a small ruler in one hand and have a pencil and paper handy.
Position yourself approximately 8 inches (20 cm) away from a mirror.
Close your left eye and align the 0 mm mark over the center of your right pupil.
Measure the distance from your right to your left pupil.
The number that lines up directly over your left pupil is your PD. (An average PD for an adult ranges between 58 and 65 mm).
