• The Sphere shows the spherical power of the lens you need. It can be a plus sign for long sightedness and a minus sign for shortsightedness.    

                               Example:   Right  +2.00Ds

                                                  Left    - 0.50Ds

• Cylinder and its axis is only filled if you need astigmatism correction  otherwise, leave it empty or Plano.

         Example how it should be written with astigmatism =  cylinder X axis

                                  Right:   +2.00 sph          -1.25 cyl  X    10  axis 

                                  Left   :    -0.50sph          +0.75 cyl  X   180 axis

• Addition (Add) is the prescription for reading or bi focal glasses. You can order just reading glasses (single vision) if you include your Addition (Add) when filling in your prescription as example below.

                                    Right: +2,00 sph -1,25 cyl  X  10   Add +1,50

                                       Left: -0,50 sph  +0,75cyl  X  180 Add +1,50

      Add is necessary when ordering reading glasses or glasses for near use.

< You can also email or  fax in your prescription to 215 9021825  >

Reading-only eyeglasses: Only some prescriptions are written separately for reading (as "NEAR", or "N.V."). In such a case, the Add (addition) has already been added on for you just for reading glasses only, hence Add will not be found in such a prescription. See example in table below.

Prescription Abbreviations and Definitions

a) OD = right eye
b) OS = left eye
c) OU = both eyes
d) PL  = PLANO; number zero
e) Sph = SPHERE power
f)  DS = Diopters sphere
g) Cyl = CYLINDER power; astigmatism correction
h) X = axis; X 70 means AXIS 070
i) ADD = the amount of power that gets added to the distance prescription to get your reading prescription or it's use for the lower portion of your bifocals and progressives
j) NV = near-vision (your prescription is for reading only)
k)PD = pupillary distance (the measurement in millimeters (mm) between your right pupil and your left pupil)
l) -150 = -1.50
m) +125 = +1.25

Sometimes, the numbers in your prescription will not include decimal points or Comma. This means that +1.75 = +175 and -0.50 = -50. Also, an axis of 60 = 060 and 8 (or 08) = 008.

         ( For Bi-focal or progressive lenses please contact us first )

• PD means "Pupillary Distance", and it's the distance between the pupils of the eyes.

• PD > Fill in your PD (average adults' PD 63mm)

If you have PD written in Right and Left separately, please add them up. Example :     Right PD: 32      Left PD: 31  =   PD is 63mm   or                     you can e mail it to us.             

Pupillary Distance (P.D.)

Pupillary Distance is the distance from the center of the pupil  in one eye to the center of the pupil in the other eye.

2 ways to take the PD as shown in images above or below

1. Place ruler (in mm) on the bridge of your nose.

2.  Get someone to measure the distance between the centers of your pupils with your eyes looking into the distance.

 A good prescription should always have PD written in the first place and you've the right to ask for it, if it's not written in your prescription.

Note:

·  Typical adult's Pupillary Distance measurements (PDs) is around 63mm

·  Typical children's Pupillary Distance measurements (PDs) is around 54mm

• Ask your eye doctor to take the measurement at the time of your eye examination.
• Call the last place that made your glasses for you and they should be able to tell you what it is.
• Go into any Optical facility and ask them to measure it for you. It will take only seconds to do and they shouldn’t charge you for it.

What if my P.D. is written 64/61?
The first number (64) is the P.D. number we require to make your lenses. The second number (61) is the near pupil distance. This number is only needed when ordering reading glasses.