Prescription Guide

Disclaimer: We recommend getting the same prescription power as your current glasses as it is the most accurate. Prescription power obtained from an autorefractor can be inaccurate and might cause vision problems and discomfort if used.

SPH 近视 / 远视

Describes your eyeglass prescription power

Near-sightedness usually comes with a (-) power
Far-sightedness usually comes with a (+) power

CYL 散光

Degree of correction of astigmatism

AXIS 散光线

Indicates the direction and degree of astigmatism

PD 瞳孔距离

Distance between your pupils

How to measure PD

Step 1:

Stand about 30cm away from a mirror.

Step 2:

Looking at yourself, hold a ruler up against your eyebrows.

Step 3:

Close your right eye, then line up the ruler so that 0mm is in line with the middle of your left pupil.

Step 4:

Look straight ahead again and then open your right eye and close your left eye.

Step 5:

Your pupillary distance measurement will be the figure that lines up with the centre of your right pupil.