To be able to graduate your lenses, we need the updated prescription written by your eye doctor, with values for the right and left eye. It is important that your values are no older than 2 years.
How to read the eye prescription:
In addition to RE (right eye) and LE (left eye), here are other common abbreviations that may be helpful in understanding your prescription:
Sphere (S/SPH): The sphere indicates lens strength. In front of the value is a plus (+) symbol if you are presbyopic and a minus (-) sign if you are nearsighted. Pay attention to the symbol when placing your order. If no symbol is present, it usually indicates a plus (+) value.
Interpupillary distance (PD): the interpupillary distance is the respective position between the center of the pupil and the center of the bridge of the nose. This tends to be different for both the right and left eye and is usually between 25 and 38 mm. This value is often denoted as a single number between 50 and 76 mm. In this case it denotes half of this value for each respective eye. For example, if you have a value of 60 mm, this would denote a distance of 30 mm for the right and left eye, respectively.
Cylinder (ZYL/ CYL): Relevant only to those with corneal irregularities: the cylinder indicates the height of the corneal curvature.
Axis (A/ACH): Relevant only to those with corneal irregularities: the axis is expressed in degrees and defines the alignment of the cylinders needed to correct corneal irregularities. You will need it for your lenses to be properly aligned. The axis is always between 0° and 180°.
Addition (ADD): Relevant only for varifocal spectacles: addition (ADD) denotes lens strength, in addition to distance correction. This is important for those who also need help when seeing things up close, such as when reading. This value is always positive and is often the same in both eyes.
